proof

PROOF noun

[ U ] uk/pruːf/ us
B2 a fact or a piece of information that shows something exists or is true

доказательство
She showed us her passport as proof of her identity. [ + (that) ] My landlord has asked for proof that I'm employed.- proof suffix uk/pruːf/ us
used at the end of words to mean 'protecting against' or 'not damaged by'

(как компонент сложных слов) непроницаемый для чего-либо
a bullet proof vest a water proof jacket