Impossible or very difficult to understand. The definition of incomprehensible is something that cannot be explained or cannot be understood.

What is it called when something is incomprehensible?

unimaginable, unintelligible, puzzling, impenetrable, opaque, unfathomable, baffling, mystifying, inconceivable, cryptic, enigmatic, inscrutable, mysterious, obscure, perplexing, sibylline, unclear, beats me, clear as mud, fathomless.

How do you use incomprehensible?

1) The report was fairly incomprehensible. 2) She found his accent virtually incomprehensible. 3) I find your attitude quite incomprehensible. 4) These accounts are utterly incomprehensible.