takes genitive case の, adjectival noun or quasi-adjective, noun, noun used as a suffix

  1. wrong, bad, improper, unjustifiable, inadvisable.
  2. not allowed, not possible.

noun

  1. failing grade.

Variations

Pronunciation Kanji Kana Is Common
不可 ふか

Contained Kanji Breakdown

negative, non-, bad
 (4th, N4)
cliff (厂) variant
divining, fortune-telling, divination or katakana to radical (no. 25)
ボク うらな.う うらない (Kentei Pre-1)
can, passable, mustn't
カ コク -べ.き (5th)
street, ward, town
チョウ テイ チン (3rd, N1)
mouth
くち コウ ク (1st, N4)