Антонимом to be weak

strong tough formidable mighty big brawny burly heavyweight hunky muscular powerful almighty buff dominant hefty Herculean husky powerhouse rugged stalwart stout strapping hard manly overpowering ripped shredded sinewy beefy hearty jacked manful meaty obdurate powerfully built well-built firm healthy fit puissant potent backboned able sound robust capable hale vigorous sturdy healthful whole athletic wholesome hardy lively virile competent well active energetic effective great convincing solid efficient heavy forceful trim energized good dynamic brave thriving invigorated productive strengthened redoubtable energised skilled substantial thick happy flourishing fat rough enthusiastic plausible straight reasonable serious refreshed activated bold salubrious indelicate useful tireless working courageous commanding well-conditioned chipper unimpaired aerobicized blooming able-bodied decisive beneficial right persuasive lusty skillful dexterous dextrous exciting skilful interesting expert unbreakable full-blooded fine red-blooded agile walking mobile okay together invulnerable fresh protected independent shielded resistant guarded comfortable proper secure well-protected safe resourceful self-reliant enterprising capable of looking after oneself

invincible invulnerable impenetrable impregnable indestructible impassable indomitable insurmountable secure unassailable powerful safe strong supreme insuperable inviolable robust unsurmountable unyielding protected unattackable unconquerable undefeatable guarded shielded resistant

durable resilient sturdy tough indestructible robust strong hardy heavy-duty imperishable lasting long-lasting rugged solid stable toughened enduring firm nonperishable reinforced resistant unbreakable undestructable armoured armored fortified infrangible invulnerable nonbreakable nonbreaking rock-solid shatterproof strengthened thick undestroyable unruinable unwreckable rich full-bodied concentrated dense hard-wearing potent intense viscous focused focussed reliable hefty undiluted uncompromising steadfast able flexible secure unyielding staunch resolute unwavering condensed industrial-strength sound tenacious stout well-made solidly built well-built strongly made powerfully built built to last

healthy fit strong well fine hearty hale sound fresh virile whole able-bodied fit as a fiddle full of life hale and hearty in good health in good physical condition in good physical shape in good shape physically fit fighting fit in fine fettle in good kilter in good trim in tip-top condition in top form the picture of health well-conditioned all right in the pink right as rain lively thriving healthful wholesome active unimpaired okay safe and sound energetic robust animated OK refreshed resolute energized invigorated bouncing able vigorous chipper together in shape as fit as a fiddle bushy-tailed energised in excellent shape bright-eyed in good condition as fit as a flea

strong keen powerful superior acute enhanced excellent exceptional potent supreme fine good great sharp superb accomplished elite intense outstanding remarkable robust sensitive sharpened sublime sure unequaled unequalled unrivalled unrivaled commanding dominant dynamic improved perfect powerhouse steady stellar sterling unparalleled unsurpassed high-calibre high-grade high-level top-notch finely honed finely tuned high-powered well-developed well-honed world-class extraordinary notable marvellous consummate splendid terrific admirable cracking first-class first-rate marvelous impressive magnificent awesome spectacular stirring stunning inspiring formidable breathtaking skillful skilled skilful profound momentous rousing arresting thrilling absorbing dignified dramatic exciting awe-inspiring premium flawless top premier super peerless prime eminent star capital illustrious prestigious matchless noted noteworthy superlative choice nonpareil sensational wonderful worthy respectable decent refined polished elegant industry leading good quality high-caliber top-quality top drawer high-quality good-quality

convincing believable cogent compelling credible plausible coherent logical persuasive realistic reasonable reliable satisfactory sound competent lucid probable rational satisfying solid strong trustworthy valid acceptable incontrovertible likely possible powerful authentic clear commonsense effective reasoned sane sensible tenable unquestionable up front well-founded well-grounded stable certain correct sure steady definite firm infallible accurate true perfect substantial secure justified unshaky right just balanced wise protected honest safe tight tense taut constant dependable guarded significant heavy healthy errorless exact precise good factual proper substantiated hard veracious defensible consistent scientific supportable unarguable uncontestable verifiable meaningful worthy OK worthwhile uncrazy smart thoughtful circumspect reflective serious responsible judicious well watertight cognizant alert clear-headed conceivable cogitable imaginable creditable supposable thinkable divine faultless impeccable unerring compos mentis unimpeachable superhuman omniscient

strong resolute steadfast uncompromising unwavering assertive bold courageous dedicated determined staunch unbendable ardent brave driven resilient spirited strong-willed tenacious true unflinching confident earnest iron-willed passionate principled resolved sure unshakable unyielding valiant fanatical feisty fierce heroic plucky unbending unfaltering unflagging unshaky backboned firm in spirit hard-nosed self-assertive self-confident strong-minded tough-minded firm tough hard stouthearted intrepid stout stalwart daring fearless dauntless gutsy hardy gallant doughty greathearted heroical valorous lionhearted gritty indefatigable indomitable persistent powerful toughened capable stout-hearted audacious game irrepressible resistant sturdy headstrong enduring durable hardened robust ironclad vertebrate vertebrated rugged inured quick to recover difficult to keep down quick to bounce back ballsy intransigent perseverant persevering relentless serious stubborn undeviating unhesitating unrelenting unshakeable unshaken vigorous committed dogged inexorable insistent intent mettlesome obdurate obstinate pertinacious purposeful purposive set steady steely mighty unchanging undaunted unswervable unswerving untiring adamant decided deliberate fixed inflexible competent manful constant single-minded rock-ribbed

advantageous favourable favorable auspicious expedient opportune profitable behooveful fortunate strategic furthersome propitious puissant to advantage

competent able adept capable expert proficient efficient skilful skilled skillful accomplished experienced knowledgeable polished qualified savvy trained consummate practised practiced

bright shining brilliant incandescent radiant vivid light luminescent luminous beaming blazing brightened dazzling fluorescent glowing illuminated lit phosphorescent bedazzling candescent gleaming illumined intense irradiated floodlit glaring lightsome lit up undimmed well-lit harsh sharp strong burning concentrated full hard striking vibrant flashing scintillating glistening shiny effulgent refulgent fulgent glistering fulgurant fulgurating fulgurous splendid flashy resplendent lucid twinkling glittering lustrous

loud noisy booming deafening thundering blaring cacophonous clamorous earsplitting reverberating ringing riotous roaring thunderous boisterous clangorous deep piercing powerful raucous reverberant stentorian strident strong tumultuous blasting carrying forceful harsh lusty resounding rowdy sonorous clearly audible ear-piercing ear-popping ear-splitting full-throated head-splitting

concentrated condensed rich thickened undiluted full-bodied potent unadulterated enriched hearty reduced

energetic enthusiastic animated contented excited exuberant fervent spirited wholehearted buoyant high-spirited keen lively thrilled warm blissful cheerful cheery exhilarated fervid glowing happy joyful joyous jubilant merry passionate vehement willing zealous ardent avid chuffed ebullient enraptured gladsome rabid rhapsodic titillated unqualified vigorous active fun-loving gung ho hearty keyed up red-hot

great considerable ample appreciable big enormous huge immeasurable immense large sizeable abundant boundless excessive high inordinate massive vast extreme gigantic handsome incalculable prodigious pronounced sizable tremendous unlimited whopping astronomic astronomical colossal giant hefty humongous humungous monstrous stupendous voluminous ginormous infinite mammoth thumping tidy titanic substantial major eventful noticeable important substantive marked fair serious respectable weighty material bountiful

sufficient adequate acceptable enough satisfactory tolerable agreeable decent commensurable commensurate proportionate sufficing unexceptionable unobjectionable

strong bull rising surging

plentiful abundant copious plenteous ample bountiful generous plenty substantial sufficient large superabundant abounding inexhaustible liberal aplenty rich wide fat profuse rife infinite replete significant full unlimited wealthy bounteous enough superfluous adequate lush overflowing big excessive lavish well-provided perfect satisfactory strong flawless faultless apt appropriate acceptable reasonable fair good enough suitable

exciting interesting absorbing engaging gripping engrossing thrilling exhilarating intriguing involving rousing dramatic riveting adventurous enthralling envigorating invigorating stimulating stirring compelling explosive breathtaking hot cliffhanging intense lively powerful wild exhilarative startling electric suspenseful arousing heart-stopping mind-bending mind-blowing mind-boggling

interesting stimulating blasé exciting inspiring rousing turbulent bitter blase bright delicious distinctive lively severe sharp tasty unfriendly ungracious yummy zingy colourful compelling animated unusual colorful

relaxed calm collected confident assured equable unfazed chilled composed tranquil carefree unbothered casual firm insouciant unafraid fearless peaceful unconcerned unshaken poised together unruffled amenable easygoing unaffected unworried civil mellow undisturbed unwavering halcyon levelheaded unnervous unshakable brave coolheaded nonchalant unflustered unperturbed idyllic placid unagitated untroubled cool-headed laid-back self-assured self-composed self-controlled stress-free cool as a cucumber cool, calm and collected

husky strong big biggish considerable goodly grand great handsome king-size king-sized large largish outsize outsized overscale overscaled oversize oversized sizable sizeable sturdy substantial tidy whacking whopping brawny burly healthy hefty powerful robust well-built well-developed giant huge important king size

punchy

rational practical intelligent sensible smart considered judicious prudent sagacious sage sapient appropriate brilliant feasible possible practicable workable brainy bright clever valid well-advised

hard firm hardened indurate rigid robust solid strong tough unbreakable impermeable unmalleable inflexible rocklike unyielding impenetrable set frozen rocky indurated renitent stiffened durable stony concentrated resilient stiff solidified sturdy unpliable rock-hard rock-like rock-solid strongly made well-made as hard as iron as hard as stone

flavorful flavoursome flavorsome sapid savory savoury tasteful tasty appetizing delectable scrumptious yummo delicious appetising interesting nice moral exciting couth

interesting colorful colourful engaging exciting imaginative lively provocative spirited stimulating appetising appetizing delicious exhilarating original pleasing sharp yummy pungent strong spicy tasty

reliable accurate dependable responsible infallible strong trustworthy proven reputable respectable eminent good sound decent notable prominent sure excellent honest righteous true established reputed virtuous distinguished fair sincere trusted attested legitimate recognised recognized stable creditable honourable honorable renowned truthful esteemed respected acclaimed faithful solid worthy highly regarded well known well-known well respected of good repute tried and trusted

to bits to blame to bluff to boot to brine tobyman to be trusted to be sure to be released to be pitied to be paid to be had