貧弱 ひんじゃく
hinjaku

Noun
na-Adjective

1. poor; meagre; meager; feeble; scanty; shabby; insubstantial

わたくしのドイツ 知識 ちしき貧弱 ひんじゃくです。
watashino doitsugono chishikiwa hinjakudesu
My knowledge of German is poor.