노약자elderly or infirm people 노약자석seat for the elderly and infirm 약점weakness; shortcoming 취약weakness; frailty; fragility 취약성weakness; frailty; fragility; vulnerability 취약점vulnerable point 허약weakness; fragility; feebleness 강약strength and weakness 문약feeble state due to literary indulgence 박약feebleness

청산가리potassium cyanide 탄산carbonic acid 탄산음료soda; carbonated drink 황산sulfuric acid 강산strong acid 강산성acidity 산acid 산성acidity 산성화acidification 산소oxygen

남성male 성격personality; character 여성woman 특성characteristic; trait; feature 편의성convenience 필요성necessity; need 가공성processability 가능성possibility; chance; likelihood 가망성possibility; chance; prospect 강제성forcibleness