がんばる
to do one's best
がんばることが大切です。
It is important to do one's best.
Try making sentences with this verb in different tenses. Active usage builds stronger recall than passive review. A fundamental N5 word — you'll use this in almost every conversation.
From the JLP Quiz question bank — the word in the form it is actually tested in.
べんきょうを がんばる ___ 、にほんごが じょうずに なります。
Answer: と
