noun
whole life; entire life
Refers to the entirety of a person's life, often used in reflective or biographical contexts.
彼は全人生を教育に捧げた。
He devoted his entire life to education.
全人生を振り返ると、後悔はない。
Looking back on my whole life, I have no regrets.
生涯 also means 'lifetime', often used in contexts like career or lifelong commitment; 全人生 is less common and more abstract.
Compound of 全 (zen, 'all, whole') and 人生 (jinsei, 'human life'). The exact historical derivation is uncertain, but the word follows a standard Sino-Japanese compounding pattern.