What does 頑張る mean?
頑張る is a Japanese verb meaning “to try one's best, to try hard, to persist” in English. It can also be translated as “to insist that, to remain in a place” depending on context. It is written as 頑張る in kanji, がんばる in hiragana, and ganbaru in romaji. This word is part of JLPT N4 vocabulary.
Example sentence
いや、頑張ればできるよ。
Yes, he can, if he tries hard.