Noun
grandfather
Usually written using kana aloneusu. 祖父さん; may be used after name as honorificsee お祖父さん
正直じいさんは、金持ちになった。
The honest old man became rich.male senior-citizen
Usually written using kana aloneusu. 爺さん; may be used after name as honorificsee 爺ちゃん
Also written 祖父さん【じいさん】jiisan