someone's word is their bond

(one's) word is (one's) bond

One always keeps one's promises. I promise that I'll be there in time with the money for the deposit: my word is my bond.
See also: bond, word

someone's word is their bond

someone keeps their promises.
A variant of this expression, now rather dated, is an Englishman's word is his bond .
See also: bond, word
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