To do what one has promised; fulfill one's promise.
Держать слово; выполнять обещания.
Paul kept his word and paid me the $250 that he owed me right on time.
Suzanne kept her word to me not to let on to others that I intend to step down next month.
Thomas always intends to keep his word, but invariably the end result is that he breaks his word. He just isn’t capable of being a responsible person.
You promised, now keep your word.
Ты пообещал, теперь сдержи слово.