練れん習しゅう不ぶ足そく

noun, noun which may take the genitive case particle 'no'

lack of practice; insufficient training

Used when someone hasn't practiced enough, often resulting in poor performance. Can be used as a noun or with の to modify another noun.

• 試し合あいに負まけたのは練れん習しゅう不ぶ足そくのせいだ。