indifference, hardness of heart, lack of concern; coolness, calmness, composure

hardness, firmness, toughness

firmness, hardness

hardness, solidity, constancy, tenacity, endurance, restraint, endurance

trial, testing, difficulty, temptation

trial, testing, difficulty, temptation

trial, testing, difficulty, temptation

difficulty

depression, depressed, grief, vexation, emotional difficulty, painful, unpleasant