祖父|そふsofu[1]atamadaka (head-high)

1. noungrandfather
   我々われわれは祖父そふの名前なまえを息子むすこに名付なづけた。↗

   We named my son after my grandfather.
2. nounold man
3. nounkyogen mask used for the role of an old man

• SynonymおじいさんNeutralNeutral word for calling your grandfather or an elderly man, as in 「隣のおじいさん」; slightly more formal than 「お爺ちゃん」.
• SynonymじいさんCasualCasual way to refer to a grandpa or an old man, as in 「あの爺さん」; used of your own grandfather it carries a familiar, affectionate feel.
• RelatedおじいさまFormalRespectful term for grandfather, as in 「おじい様はお元気ですか」. Mostly used when speaking of the listener's grandfather; said of your own it sounds very formal.
• RelatedおじいちゃんCasualColloquial, affectionate way to say grandpa; also covers old men in general. Warmer than 「祖父」 and not used as a humble term when speaking to outsiders.
• Antonym祖母そぼNeutralThe counterpart of 「祖父」: grandmother, whether paternal or maternal.

Use 「祖父」 to refer to your own grandfather when speaking to outsiders. Address him as 「お爺ちゃん」 or 「お祖父さん」; 「おじい様」 is a respectful term, often for someone else's grandfather; 「爺さん」 is casual. For grandmother, use 「祖母」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ある人物じんぶつの親おやの親おやのうち、男性だんせいである人物じんぶつ。
2. 二親等にしんとうの尊属そんぞくの男性だんせい。