他喜怒无常，极难相处。

He is moody and difficult to get along with.

Source: Tatoeba

Sentence Composition

1 他 tā
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)
2 喜怒无常 xǐnùwúcháng
  1. temperamental
  2. moody
=3 极 jí
  1. extremely
  2. pole (geography, physics)
  3. utmost
  4. top
=3 极 jí
  1. (historical dictionaries only) wooden rack on donkey
  2. wooden rack on donkey
=4 难 nán
  1. difficult (to...)
  2. problem
  3. difficulty
  4. difficult
  5. not good
=4 难 nàn
  1. disaster
  2. distress
  3. to scold
5 相处 xiāngchǔ
  1. to be in contact (with sb)
  2. to associate
  3. to interact
  4. to get along (well, poorly)