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.