いらっしゃる

Originally a contraction of いらせらる (iraseraru), itself an honorific conjugation of 入ら (ira, the 未然形 (mizenkei, “imperfective”) of verb iru, “to come in, to go in; to arrive; to be in a place”) + せ (se, the 未然形 (mizenkei, “imperfective”) of honorific auxiliary verb su) + らる (raru, the older form of passivizing auxiliary verb rareru, here serving as another honorific).[1][2]

• (Tokyo) いらっしゃ​る [ìrássháꜜrù] (Nakadaka – [4])[2]
• IPA^(key): [iɾa̠ɕːa̠ɾɯ̟ᵝ]

いらっしゃる • (irassharu) intransitive godan (stem いらっしゃり (irasshari) or いらっしゃい (irasshai), past いらっしゃった (irasshatta))

1. (honorific) to go
   • 1994, Yasuo Uchida, 三州吉良殺人事件 [Sanshū Kira Satsujin Jiken, Murder in Kira, Sanshū], Tōkyō: Kadokawa Shoten Publishing Co., Ltd, →ISBN, page 28:

     孫(まご)娘(むすめ)は身(み)をよじらんばかりに恐(きょう)縮(しゅく)して、「あの、これからどちらへいらっしゃるのでしょうか？」と訊(き)いた。

     Magomusume wa mi o yojiran bakari ni kyōshuku shite, “ano, kore kara dochira e irassharu no deshō ka?” to kiita.

     The granddaughter asked, so shyly that she was practically writhing, "Um, where might you be going next?"

2. (honorific) to come
   • 1933, Tatsuo Hori, 美しい村 [Utsukushii Mura, Beautiful Village]‎, Aozora Bunko:

     でも一(いっ)体(たい)、何(なん)時(じ)ごろあなた方(がた)はこちらへいらっしゃるのかしら？

     De mo ittai, nanji goro anatagata wa kochira e irassharu no kashira?

     But then, around what time would you be coming, I wonder?

3. (honorific) to be

   山(やま)田(だ)さんはいらっしゃいますでしょうか。

   Yamada-san wa irasshaimasu deshō ka.

   Is Ms. Yamada there? (such as when telephoning a place of business)

   お元(げん)気(き)でいらっしゃいますか。

   O-genki de irasshaimasu ka.

   Are you doing well?

As listed above, いらっしゃる (irassharu) may be roughly synonymous with 行(い)く (iku, “to go”), 来(く)る (kuru, “to come”) or いる (iru, “to be”). Which meaning is intended depends on context. Compare お出(い)で (oide) of similarly broad and context-dependent meaning.

• The -te form いらっしゃって (irasshatte) has the variants いらして (irashite), いらっして (irasshite), いらしって (irashitte), and いらっしって (irasshitte). Similarly, verb forms created from the addition of a suffix with initial /t/, such as た (-ta), たら (-tara), たり (-tari), たって (-tatte), etc., have analogous variants.

• お出(い)でになる (oide ni naru)

• いらっしゃい (irasshai)
• いらっしゃいませ (irasshaimase)