Антонимом extremely informal

formal official constrained dressy noncasual ceremonious conventional stiff buttoned-up dressed-up rigid smart stylish elegant elaborate classy ornate ritzy swish sharp sophisticated modish dashing fashionable fly natty chic snazzy spiffy snappy trendy sassy schmick kicky tony with it ceremonial uncomfortable authoritative authorized authorised

bookish learned literary scholarly lettered erudite cultured knowledgeable intellectual academic highbrow cultivated sage literate civilised civilized studious pedantic donnish accomplished educated intelligent clever recondite esoteric wise sagacious well-read well educated well versed pedagogical discerning cerebral earnest impractical enlightened sapient brainy ivory-towerish expert skilled versed thoughtful widely read serious bluestocking well informed illuminated sophisticated well read clerkly labored laboured egghead swotty genius formal standard correct stilted

ceremonial orthodox regular routine conventional ceremonious formal normal usual standard common conforming conformist ordinary typical proper natural sound customary established traditional appropriate methodical familiar systematic suitable fitting above board

tense edgy anxious nervous uptight restless overanxious stressed uneasy apprehensive disturbed insecure worried agitated concerned jittery panicky wired antsy fidgety strained troubled fretful overstrung overwrought jumpy pressured stressy unnerved unrelaxed adrenalized excited nervy perturbed shaky unquiet dithery fluttery goosey queasy queazy toey twitchy upset aflutter atwitter high-strung hyper keyed-up squirrelly white-knuckled wound-up a bundle of nerves beside oneself highly strung hung up ill at ease in a state of agitation in a state of nerves keyed up on edge on pins and needles on tenterhooks stressed out strung out strung up under a strain under pressure worked up wound up wrought up

strict rigid rigorous stringent controlled intolerant stern tough illiberal inflexible regimented tight fastidious particular punctilious specific firm fixed intransigent obstinate systematic dour pertinacious set steadfast uncompromising binding disciplined formal harsh stiff authoritarian changeless draconian headstrong immutable hardline intractable ironclad obdurate resolute invariable stubborn unalterable unchangeable unchanging unrelenting explicit scrupulous unadaptable unshakeable unsparing unvarying unbending undeviating unpermissive unpersuadable unwavering unyielding cast-iron hard-line iron-fisted no-nonsense rigidly enforced strictly controlled meticulous onerous methodical pedantic hard static ascetic demanding fussy diligent precise extreme thorough grueling laborious religious finicky finical painstaking gruelling

hostile antagonistic bitter acrimonious contentious spiteful aggressive angry belligerent combative competitive uncompromising argumentative bellicose disagreeable fierce harsh quarrelsome unfriendly unsociable vigorous virulent brutal catty cutting embittered hard-hitting hateful indignant inhospitable inimical intense intimidating mean nasty pugnacious rancorous rapacious resentful rigorous savage severe stinging tough unpleasant vicious violent vitriolic warlike

unidiomatic nonidiomatic stilted

ungracious unfriendly ungenial unpleasant unsociable bad-tempered disagreeable ill-natured ill-tempered inhospitable unamiable brusque cold discourteous distant haughty prickly rude stand-offish surly unapproachable uncivil complaining disdainful grouchy grumbling hateful impolite irritable mean miserable nasty reserved uncivilised uncivilized unhappy unkind unmannerly unrefined unsophisticated uncomfortable formal cool

strange unaccustomed mysterious peculiar bizarre creepy curious eccentric eerie extraordinary mystifying odd quirky spooky unfamiliar unusual weird abnormal atypical queer suspicious uncanny uncharacteristic unnatural untypical kooky uncommon refined different

impersonal formal cold unrelaxing inhospitable unrelaxed stiff unfriendly wooden austere chilly cool forbidding passionless unemotional comfortless distant dreary remote spiritless unwelcoming frigid lonely lonesome stony unfeeling

prepared considered planned premeditated premeditative rehearsed studied affected stilted deliberately written deliberate

scientific experimental objective

uncomfortable stiff tight constricted rigid snug compact inflexible taut thick unbending close-fitting small tense tiny body-hugging confined limited restricted skin-tight tight-fitting

unapproachable inaccessible inapproachable reserved standoffish uncommunicative unfriendly aloof frigid hesitant undemonstrative unforthcoming unsociable guarded unavailable unresponsive unsympathetic withdrawn frosty stand-offish untouchable remote distant cool chilly uncongenial formal cold as ice unreachable detached indifferent cold proud asocial stiff superior impersonal austere eremitic discourteous reclusive uppity standoff antisocial unconcerned unwelcoming incurious snobbish haughty dry supercilious inhospitable solitary offish forbidding unpleasant stuffy uninterested lofty uncivil ungregarious snooty uncompanionable unbending reticent unsocial disdainful unclubbable laid back cold-eyed thick-skinned on ice cold fish hard-hearted stuck up hard-boiled buttoned-up lone wolf putting on airs

indoor inside interior within

pretentious

unusual extraordinary uncommon unexpected abnormal exceptional infrequent odd rare seldom sporadic weird phenomenal surprising peculiar unaccustomed preternatural unfamiliar aberrated uncustomary aberrant irregular bizarre unwonted outlandish unorthodox strange unconventional unprecedented left-field out of the ordinary

passionate determined persistent resolute committed dedicated driven firm unwavering unyielding concerned earnest indefatigable indomitable intransigent perseverant persevering relentless serious steadfast strong stubborn tenacious uncompromising undeviating unfaltering unhesitating unrelenting unshakable unshakeable unshaken assertive bold dogged gritty inexorable inflexible insistent intent interested mettlesome obdurate obstinate pertinacious purposeful purposive resolved spirited staunch steady steely stout undaunted unflagging unswervable unswerving untiring valiant vigorous adamant capable competent courageous decided deliberate enthusiastic fixed gutsy manful set stouthearted constant plucky rock-ribbed single-minded stout-hearted strong-minded strong-willed toughened

contrived feigned forced artificial labored laboured unnatural fake manufactured phoney phony factitious strained affected bogus mock staged pretended assumed mechanical overdone spurious false hokey manipulated simulated plastic pseudo put-on

concerned affected interested involved connected related implicated

official occupational business company employment work working corporate professional commercial industrial work-related house

reserved constrained conventional discreet formal polite restrained cautious conservative controlled obscure proper strict ambiguous bland composed cryptic diplomatic dubious indistinct inexplicit mannerly prim respectful reticent seemly strained unclear vague civil conforming conformist considerate cordial correct cultured decorous enigmatical gracious methodical poised polished stilted timid withdrawn bottled up self-controlled self-possessed

extremely large extremely noisy extremely painful extremely particular extremely poor extremely slow extremely hot extremely high extremely frugal extremely foolish extremely crowded extremely critical