Positive:
* Reliable: This emphasizes their dependability and trustworthiness.
* Honorable: This highlights their adherence to ethical principles and commitment to doing what's right.
* Trustworthy: This focuses on their ability to be trusted and their lack of deceit.
* Principled: This suggests they have a strong sense of right and wrong and act accordingly.
* Man of his word: This is a classic and direct way to describe someone who is true to their promises.
* Loyal: This implies a strong commitment to others and their agreements.
* Integrity: This emphasizes their moral soundness and consistency in their actions.
* Unwavering: This highlights their steadfastness and determination to keep their word.
Other:
* Steady: This suggests a consistent and dependable nature.
* Respectful: This implies they value the importance of keeping their commitments.
* Strong-willed: This emphasizes their determination and willpower.
* Disciplined: This highlights their ability to control themselves and follow through on their promises.
The best word to use will depend on the specific situation and what you want to convey about the person.