고단하다: 고단하다 tired; fatigued; exhausted; weary; worn out. 고단한 일 exhausting[tiring / fatiguing] work. 고단하여 잠자리에 들다 go to bed fatigued. 몸이 ~ have a weary body / feel worn out[done in]. 몹시 ~ be ready to drop (
단단하다: 단단하다1 [굳다] hard; solid; adamantine; [견고하다] firm; [오래 견디다] durable. 단단한 돌 a hard stone. 단단한 기초 a solid foundation / a firm basis. 단단한 가구 solidly-built[sturdy] furniture. 쇠같이 ~ as hard as iron. 단단해지다
대단하다: 대단하다1 [수가 많다] many; a great[large / good] number of; [양이 많다] much; a great[good] deal of; [엄청나다] countless; innumerable; enormous; immense. 대단한 금액 a colossal[huge / vast] sum. 대단한 비용 enormous[immen