godan verb (-aru, special), auxiliary verb
is doing; are doing
Honorific auxiliary verb attached to the -te form of a verb. Abbreviation of いらっしゃる in this auxiliary use. Used to show respect toward the subject of the action.
See also: いらっしゃる
先生は何をしていらっしゃいますか。
What is the teacher doing? (honorific)
お客様がお待ちになっていらっしゃいます。
The customer is waiting. (honorific)