- believe to be the case (verb)
- I understand you have no previous experience?
- make sense of a language (verb)
- She understands French
- perceive (an idea or situation) mentally (verb)
- I don't understand the idea
- be understanding of (verb)
- You don't need to explain--I understand!
- know and comprehend the nature or meaning of (verb)
- She did not understand her husband
- I understand what she means
See definition of understand in Merriam Webster