我想的是evidence是证据，evident是形容词，表示清楚的，那么self-evident这个词应该是自证清白或者保持自己清白的意思。No，不是这个意思，但是和这个意思多少有点关联。先猜一下词意，然后再查词典，意外可以让我们更容易的记住单词。

Read word and guess the meaning, today's word: self-evident
What I consider is that evidence means to prove and evident means obviousely. So this word should mean something like proving yourself is innocent or to keeping you are innocent. No, it is not correct, but something is related to this point a little bit. Please guess the meaning first, then check dictionary, unexpectation can help us to remember words easier.