おじいさん（おじいさん）— grandfather; elderly man
あの 男の人 は おじいさん です。
That man is elderly.
おじいさんおじいさん
grandfather; elderly man
おじいさん
accent [2]In detail
Words
あのanothat
男の人otoko no hitoman
はwa(topic marker)
おじいさんojiisanelderly man
ですdesu(polite sentence ending)
おじいさん can refer to a grandfather or an elderly man. When speaking about your own grandfather to someone outside the family, 祖父 is useful. Do not assume every older stranger welcomes being addressed as おじいさん.
Coco-sensei