(每日一词）truism

Truism /ˈtruː.ɪ.zəm/ n. 自明之理，不言而喻的话, 陈词滥调

meaning: a statement that is so obvioulsy true that it is almost not worth saying.

1) 词根：tru-真实(true)

2) 后缀：-ism 名词后缀(socialism, capitalism, materialism)

e.g. As far as health is concerned, it's a truism that prevention is better than cure. 就健康而言，预防胜于治疗，这是不言而喻的。