充分， 充足，充实，足够，sufficient

its time to 充。

充分 - 1， 形，足够， 用于抽象事物

最重要的语言点： 充分与充足不同在于充分的意思是 sufficient to convince, win, etc. 充足仅仅是足够，丰富，很多而已。

充分 - 2， 副， "to the full" - 充分利用 to use something "completely, to its full use, etc.)

充足 - 1， 形， 具体或者抽象， 强调丰富，很多。 就是足够。

充实 - 1， 动 to replenish, strengthen, enrich, etc. It's a weird thing in English for many of its uses. But that really follows all verbs/adjs involved in knowlege or mind related stuff
2, 形 rich, 丰富，满足心理上， substantial, full

足够 - 1， 形 (you need to know this word by now) 'enough' 'sufficient', 具体