Staunch
Part of speech: verb
Definition: To stop the flow of (blood). To stop, check, or deter an action.
Part of speech: adjective
Definition: loyal, trustworthy, reliable, outstanding dependable, persistent
Example sentence: As a member of the House Armed Services Committee and the Congressional Joint Strike Fighter Caucus, I have been a staunch supporter of the production of the F-35 since day one and understand the importance of its production for my fellow Texans and our nation's security.
Unswerving
Part of speech: adjective
Definition: Not deviating; not yielding or straying or varying.