非

fēi
  1. to not be; not
  2. wrong; incorrect
  3. non-; un-; in-; de-
  4. to reproach; to blame
  5. (coll.) to insist on; simply must

CEDICT

colloquial

Homographs

非 Fēi abbr. for 非洲 Fēizhōu, Africa