Chinese

Verb

不懂

1. not to understand
2. cannot (see, hear, understand, as verb complement)

   看不懂  ―  kànbùdǒng  ―  can't read (and understand), can't understand (what's written)

   聽不懂 / 听不懂  ―  tīngbùdǒng  ―  can't understand (what's being said)

Noun

不懂

1. incomprehension