这组词都有“疾病”的意思,其区别是:
illness: 不具体指,而是泛指一切疾病,强调生病的时间或状语,语体较sickness正式一些。
sickness: 较口语化,可与illness换用,但还可表示“恶心”。
disease: 指具体的疾病,且通常较严重,发病时间也较长。
complaint: 现代英语中,既可指症状,也可指疾病。
independent: 不依靠的,独立的(of)。如:John was independent of his parents when he was still a child.
dependent: 依赖的,依靠的(on, upon)。如:Success is dependent on your hard work.