不充分(ふじゅうぶん)insufficient, inadequate, imperfect, shortage

不十分(ふじゅうぶん)な明(あか)るさで読書(どくしょ)をしてはいけません。

You should not read in insufficient light.

証拠(しょうこ)が不十分(ふじゅうぶん)な彼(かれ)を有罪(ゆうざい)にすることは出来(でき)ない。

We cannot declare him guilty as the evidence is insufficient. {insufficient, inadequate, imperfect, shortage}

両親(りょうしん)を設備(せつび)が不十分(ふじゅうぶん)な病院(びょういん)に入院(にゅういん)させたくありません。

I don't want to admit my parents to a hospital with insufficient facilities. {insufficient, inadequate, imperfect, shortage}

説明(せつめい)が不十分(ふじゅうぶん)だったとあって、多(おお)くの誤解(ごかい)を招(まね)いてしまいました。

Due to the explanation being insufficient, it led to many misunderstandings. {insufficient, inadequate, imperfect, shortage}

ネイティブたちの会話(かいわ)についていけず、日本語(にほんご)の力(ちから)が不十分(ふじゅうぶん)なことに気(き)がついた。

I realized that my Japanese language skills were insufficient when I couldn't follow the conversations of the natives. {insufficient, inadequate, imperfect, shortage}