力ちから不ぶ足そく

noun, noun which may take the genitive case particle 'no', na-adjective

lack of ability; inadequacy; out of one's depth

Describes a situation where one's own skill, strength, or resources are insufficient for a task. Often used humbly about oneself.

• 私わたしの力ちから不ぶ足そくでプロジェクトが遅おくれてしまった。

  The project was delayed due to my lack of ability.

• この問もん題だいは私わたしには力ちから不ぶ足そくだ。

  This problem is beyond my ability.