Welcome and courtesy (مرحبا بكم، البيت بيتك، الله يسلمك)

At the door

مرحبا بكم(marhaban bikum) (welcome to you) greets guests; to one guest it is مرحبا بك. أهلا وسهلا is the everyday welcome, مرحبا بكم the host's and the speaker's. Once the guest is inside, البيت بيتك(al-baytu baytuka) (the house is your house) means make yourself at home.

Serving and helping

إليك(ilayka) (to you) hands something over, and the thing follows it: إليك القهوة here is your coffee. تفضل can stand alone and also means go ahead, come in; the two often go together.

في خدمتك(fî khidmatika) (in your service) offers help warmly. تحت أمرك (under your command) is more deferential: a waiter's word.

Asking and answering

على ما يرام(alâ mâ yurâmu) (as one would wish) says that a thing or a person is fine. بخير answers how are you?; على ما يرام also fits plans, food and the evening.

ما رأيك(mâ ra'yuka) asks what do you think? With في it asks about a thing; with أن and a verb it suggests: how about …? لا أدري(lâ adrî) is I don't know, a little more literary than لا أعرف.

Goodbyes

The one who stays says مع السلامة, or رافقتك السلامة(râfaqatka s-salâma) (may safety go with you) to a traveller. The one who leaves answers الله يسلمك(allâhu yusallimuka) (God keep you), the spoken formula; in writing it is سلمك الله.

Speeches and signs

سيداتي وسادتي(sayyidâti wa sâdati) (ladies and gentlemen) opens a speech or an announcement. الرجاء عدم(ar-rajâ'u 'adamu) + a verbal noun is the polite notice please do not …; ممنوع is a flat ban (ممنوع التدخين no smoking).

Contributors