What does 是非 mean?
是非 is a Japanese adverb meaning “by all means, certainly” in English. It can also be translated as “right and wrong” depending on context. It is written as 是非 in kanji, ぜひ in hiragana, and zehi in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
「キャッチボールしようか」「よし、是非やろう」
"How about playing catch?" "Sure, why not?"