To give somebody your word is to promise faithfully. I give somebody your word.
It is the strongest promise there is without paper, which is why breaking it matters so much. To give somebody your word costs nothing at the time and everything if it fails.
1phrasegive somebody your wordTo promise faithfully.
“He would give somebody your word and that was the end of the matter.”
give somebody your word is a phrase.
Practised in Idioms