noun
perennial youth; agelessness
Refers to the state of not aging or remaining youthful forever. Often used in fixed expressions like 不老長寿 (eternal youth and longevity) or 不老不死 (immortality).
不老長寿は昔から人々の憧れだ。
Eternal youth and longevity have been a dream of people since ancient times.
彼女はまるで不老のように若々しい。
She looks so youthful, as if she were ageless.
Compound of 不 (not) and 老 (to age). The word is of Chinese origin (cf. Chinese 不老 bùlǎo).