brac イディオム

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brace

to brace somebody: to grab; to shake up

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bracelets

handcuffs

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Belt and braces

(UK) Someone who wears belt and braces is very cautious and takes no risks.

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brace up

brace up
Also, brace oneself. Summon up one's courage or resolve, as in Brace up, we don't have much farther to go, or Squaring his shoulders, he braced himself for the next wave. This idiom uses brace in the sense of “to bolster” or “to strengthen.” The first term dates from the early 1700s, the variant from about 1500.