1.
middle age; prime of life
The period of life roughly from the late thirties to the mid-fifties, considered a person's most productive and vigorous adult years. In Japanese usage this often emphasizes capability and maturity rather than decline.
彼は壮年期を迎えた。
He entered middle age.
壮年期は体力と経験のバランスが良い時期だ。
Middle age is a period when physical strength and experience are well balanced.
壮年期の男性は仕事でも家庭でも中心的な役割を担うことが多い。
Men in their prime often play a central role both at work and in the family.
Refers to the stage of life between youth (青年期) and old age (老年期), typically spanning the late thirties through the fifties. The term carries a positive nuance of being at the peak of one's powers, unlike English "middle age" which can imply decline.
COMMON COLLOCATIONS:
- 壮年期を迎える: to enter middle age
- 壮年期の男性: middle-aged man
- 壮年期の女性: middle-aged woman
- 壮年期に達する: to reach one's prime
LIFE STAGE SEQUENCE:
- 幼年期: early childhood
- 少年期: boyhood/girlhood
- 青年期: youth
- 壮年期: prime of life / middle age
- 中年期: middle age (more neutral)
- 老年期: old age
SIMILAR WORDS:
- 中年: middle age — more neutral and sometimes negative; 壮年期 emphasizes vigor
- 働き盛り: prime working years — focuses specifically on career productivity