true to word
true to (one's) word
As one has promised. Ted has never broken a promise to me before and, true to his word, he came and helped us move all that furniture. He's the best friend a guy could have.
true to one's word
keeping one's promise. True to his word, Tom showed up at exactly eight o'clock. We'll soon know if Jane is true to her word. We'll see if she does what she promised.