verb (v)

• know and comprehend the nature or meaning of(verb.cognition)

  Example:
  She did not understand her husband.
  I understand what she means.
  

  source: wordnet30
• perceive (an idea or situation) mentally(verb.cognition)

  Example:
  I don't understand the idea.
  

  Synonym:
  realise, realize, see
  

  source: wordnet30
• make sense of a language(verb.cognition)

  Example:
  She understands French.
  

  Synonym:
  interpret, read, translate
  

  source: wordnet30
• believe to be the case(verb.cognition)

  Example:
  I understand you have no previous experience?.
  

  Synonym:
  infer
  

  source: wordnet30
• be understanding of(verb.cognition)

  Example:
  You don't need to explain--I understand!.
  

  Synonym:
  empathise, empathize, sympathise, sympathize
  

  source: wordnet30
• To have just and adequate ideas of; to apprehended the meaning or intention of; to have knowledge of; to comprehend; to know; as, to understand a problem in Euclid; to understand a proposition or a declaration; the court understands the advocate or his argument; to understand the sacred oracles; to understand a nod or a wink.(verb)

  source: webster1913
• To have the use of the intellectual faculties; to be an intelligent being.(verb)

  source: webster1913