Godan verb, transitive verb

  1. to take for granted, to assume, to be convinced (that), to jump to the conclusion (that).
  2. to pretend (to be), to pose (as), to fancy oneself (to be), to feign (e.g. ignorance).
  3. to go through with (what one decided to do), to persist in doing, to make up one's mind.

Variations

Pronunciation Kanji Kana Is Common
 
 
決め込む きめこむ
 
 
 
決めこむ きめこむ
 
決込む きめこむ
 
 
極め込む きめこむ

Contained Kanji Breakdown

decide, fix, agree upon
き.める ケツ さ.く (3rd, N3)
water, water radical (no. 85)
さんずい
decide, determine, archery glove
カイ ケツ ケチ (Kentei 1)
large, big
ダイ おお- た (1st, N5)
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
person
ひと ニン ジン (1st, N5)
crowded, mixture, in bulk
-こ.む こみ ごめ (7th, N3)
enter, insert
い.る はい.る ニュウ (1st, N5)