What does 一生 mean?
一生 is a Japanese noun meaning “throughout (one's) life” in English. It can also be translated as “(the only, the greatest, etc.) of one's life” depending on context. It is written as 一生 in kanji, いっしょう in hiragana, and isshou in romaji. This word is part of JLPT N3 vocabulary.
Example sentences
あなたは、一生勉強しなければならない。
You must study your whole life.
マイホームは一生の買い物だからね、そんな即断即決はできないよ。
A home is a once-in-a-lifetime purchase so you don't want to make any snap decisions.