whole life; entire life
Refers to the entirety of a person's life, often used in reflective or biographical contexts.
He devoted his entire life to education.
Looking back on my whole life, I have no regrets.
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.