steadfast russian
твёрдый
hard, solid, stable
firm, strong, steadfast
сто́йкий
steadfast adj
able to resist and not retreat in the face of difficulty
му́жественный
courageous, manly, steadfast
твёрдость
hardness, solidity, firmness, steadfastness
сто́йкость
firmness, steadfastness, staunchness, stableness, stability, resistance, durability
непоколеби́мый
firm, steadfast, unshakeable, unflagging, unflinching
твердока́менный
steadfast, staunch, unflinching, unwavering
вы́держанность
firmness, steadfastness, staunchness, self-control, self-command, self-possession, consistency
вы́держанный
self-possessed, self-restrained, staunch, steadfast, consistent
непоколеби́мость
firmness, steadfastness
неукло́нный
steadfast, unflinching, steady