忘年 ぼうねん

bōnen

1. Not a childhood friend.; Not someone from one's youth.

1. Was a mismatched age pair.; Was an age-gap relationship.

1. Forgetfulness due to old age.; Old-age-related forgetfulness.

1. Of old times; Long-ago

1. It is not a generation gap.; I am not that old.

1. It's not a mistake.; It's not a blunder.

1. Was a forgetful year.; It was a year of forgetting.

1. Respectful relationship; Age difference

1. It is not a mismatch in age.; It is not an age difference.

1. Was not a friend of a different generation.; Was not a close friend with a large age gap.

1. Probably a mismatch in age.; Likely a generation gap.

1. Was not a close friend despite an age difference.; Was not a youthful/immature person.

1. Wasn't a mismatch in age.; Wasn't an age difference.

1. Probably forgotten.; Probably lost to time.

1. Was not a close/long-time friend.; Was not an old acquaintance.

1. If I forgot…; If I were to forget…

1. If [one] forgets the years; If [someone] is forgetful of their age

1. If forgotten; When forgotten