adjectival noun or quasi-adjective, takes genitive case の, noun

  1. sudden, abrupt, unexpected, unforeseen.

Variations

Pronunciation Kanji Kana Is Common
不意 ふい

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)
idea, mind, heart
イ もと よし (3rd, N4)
sound, noise
おと オン ね (1st, N4)
stand up, rise, set up
た.つ リツ たつ (1st, N4)
kettle lid radical (no. 8)
トウ (Kentei 1)
grass, straw, herbs
to divide
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
day, sun, Japan
ひ にっ ニチ (1st, N5)
heart, mind, spirit
こころ シン (2nd, N4)