しゅうせい
all one's life; throughout one's life; as long as one lives
Also written 終世
Noun, Adverb
彼女かのじょは終生しゅうせいその町まちに住すんだ。
She lived all her life in that town.
彼かれは終生しゅうせい貧乏びんぼうのままだった。
He remained poor all his life.
彼女かのじょは終生しゅうせい研究けんきゅうを続つづけました。
She continued studying all her life.