お母様(かあさま)

おかあさま
noun
mother (highly polite); your mother; Mother
formalhonorificfamily
1. mother (highly polite term)
Very polite term for someone else's mother, used to show respect to the listener or a third party. In some traditional or well-to-do families, children also use it to address their own mother. More formal than お母(かあ)さん.
お母様(かあさま)はお元気(げんき)ですか。
Is your mother well?
お母様(かあさま)によろしくお伝(つた)えください。
Please give my regards to your mother.
The other day Mr. Tanaka's mother gave me some homemade sweets.

The honorific prefix お plus the honorific suffix 様(さま). Used mainly for the listener's or a third party's mother; when talking about your own mother to outsiders, say 母(はは).

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From casual to formal:

Common collocations