The term 'firm and steadfast' can be summarized as being unwavering in one's commitment and dedication. This is often used to describe someone who is loyal and reliable, and who will not waver in their beliefs or actions. The crossword solution for this term is 'STAUNCH', which means to be resolute and determined. STAUNCH is often used to describe someone who is loyal and committed to a cause or belief, and who will not waver in their dedication.