What does 是非 mean?
是非 is a Japanese noun meaning “certainly, by all means; without fail” 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 N4 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?"