1The honorific (sonkeigo) form of する ('to do'), used to respectfully refer to the actions of someone the speaker is showing deference to; an irregular godan verb, usually written in kana.
先生は毎朝散歩をなさいます。
The teacher takes a walk every morning.
お客様、どうぞご自由になさってください。
Please feel free to do as you wish, sir/madam.
部長は昨日どんなお話をなさいましたか。
What did the department head talk about yesterday?
お飲み物は何になさいますか。
What would you like to drink?