Hold firm is a phrase that means to remain resolute and not waver in one's beliefs or convictions. The crossword solutions for this term are standpat (8 letters), RIVET (5 letters), and standonesground (15 letters). Standpat is an adjective meaning to remain unyielding or inflexible. RIVET is a verb meaning to fix firmly in place. Standonesground is an idiom meaning to remain steadfast and not give in to pressure.