足りなかった

was not enough, was insufficient

→ 足りる
足り be enough, suffice + なかっ Negative past + Past tense
verb · past indicative Rare #26,063
was not enough, was insufficient
JA: お金が足りなかったので、買えませんでした。
EN: There wasn't enough money, so I couldn't buy it.
Conjugation of 足りる
Indicative past
足りなかった

全部調査するには時間が足りなかったことだ

Apparently, there wasn't enough time to investigate everything.

君が失敗したのは努力足りなかったからだ

You failed because you didn’t put in enough effort.

私の説明足りなかったかもしれません

Perhaps I didn't explain it well enough.

彼女は注意足りなかったから試験にとうてい合格できない

She wasn't careful enough, so there's no way she'll pass the exam.

あなたが失敗したのは努力足りなかったからだ

You failed because you didn't try hard enough.

彼は確かに最善を尽くした注意足りなかった

He certainly did his best, but he wasn't careful enough.

新しい足りなかったんです

The new amount wasn’t enough.

— アイム・スティル・ヒア (2024)