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

  1. optional, voluntary, arbitrary, random, discretionary, facultative, spontaneous, any.
  2. Mathematics.arbitrary.

Variations

Pronunciation Kanji Kana Is Common
任意 にんい

Contained Kanji Breakdown

responsibility, duty, term
まか.せる ニン とう (5th, N3)
human radical (no. 9)
9th calendar sign
みずのえ ジン ニン (Kentei Pre-1)
katakana no radical (no. 4)
ヘツ えい よう (Kentei 1)
soil, earth, ground
ド つち は (1st, N5)
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)