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

  1. lack of ability, inadequacy, (being) out of one's depth.

Variations

Pronunciation Kanji Kana Is Common
力不足 ちからぶそく

Contained Kanji Breakdown

power, strength, strong
リョク ちから リキ (1st, N4)
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)
leg, foot, be sufficient
あし た.りる ソク (1st, N4)
mouth
くち コウ ク (1st, N4)
stop, halt
と.まる シ どめ (2nd, N4)
divining, fortune-telling, divination or katakana to radical (no. 25)
ボク うらな.う うらない (Kentei Pre-1)