A man of his word. One whose word may be depended on; trustworthy.
As good as his word. In French, “Un homme de parole.” One who keeps his word.
I take you at your word. In French, “Je vous prend au mot.” I will act in reliance of what you tell me.
Pray, make no words about it. In French, “Nʹen dites mot.” Donʹt mention it; make no fuss about it.
Speak a good word for me. In French, “Dites un mot en ma faveur.”
To pass one’s word. In French, “Donner sa parole.” To promise to do something required.
Upon my word. Assuredly; by my troth.
“Upon my word, you answer … discreetly.”—Jane Austen.
Upon my word and honour! A strong affirmation of the speaker as to the truth of what he has asserted.