middle age

US /ˌmɪd.l̩ ˈeɪdʒ/
UK /ˌmɪd.l̩ ˈeɪdʒ/
"middle age" picture
1.

中年

the period of life between youth and old age, usually considered to be between the ages of 45 and 65

:
He's in his middle age, but still very active.
彼は中年だが、まだ非常に活動的だ。
Many people experience a 'midlife crisis' during middle age.
多くの人が中年期に「中年の危機」を経験する。