(adjective) Having or demonstrating undivided and constant support for someone or something.
"Be good to your work, your word, and your friend."
"Just that you do the right thing. The rest doesn't matter. Cold or warm."
"Sometimes you put walls up not to keep people out, but to see who cares enough to break them down."
"I want to grow old without facelifts. I want to have the courage to be loyal to the face I have made."