de-
pref 前缀 (with vs and related adjs, advs and ns 与动词、 形容词、 副词、 名词结合)
1 opposite or negative of ...的反义或否定
defrost * decentralization.
2 removal of 除掉...: defuse * derailment.
Of course, the Hubble is above the earth's atmosphere, so it will soon be sending us the clearest pictures of the stars and distant galaxies that we have ever seen.