英和和英

the teen years

octogenarian

a man in his eighties

(in Buddhism) one's seventh birth

someone whose age is in the eighties

a man in his seventies

in the eighties

someone whose age is in the seventies

He is in the 80's.

a man in his nineties

She is in her eighties.

someone whose age is in the nineties

the octogenarian population

in the seventies

The number of octogenarians continues to grow.

My father is in his seventies.

I like old things from the 70's and 80's.

This problem has been confirmed in this country since the 80's.