firmness russian
про́чность
durability, solidity, firmness, strength, fastness
твёрдость
hardness, solidity, firmness, steadfastness
сто́йкость
firmness, steadfastness, staunchness, stableness, stability, resistance, durability
целеустремлённость
purposefulness, firmness of purpose
незы́блемость
firmness, stability
вы́держанность
firmness, steadfastness, staunchness, self-control, self-command, self-possession, consistency
моноли́тность
monolithic character, solidity, firmness
непоколеби́мость
firmness, steadfastness
нетвёрдость
unsteadiness, lack of firmness