While i was teaching one of my students i explained an interesting point about adding "م" letter to some verbs and nouns and then it will refer to the place where we do that verb or noun, for example:

خرج got out

دخل entered

جمع gathered

صلى prayed

طعم taste

طار flew

وقف stopped

خبز baked (bread)

Exit

م + خرج = مخرج

Entrance

م + دخل = مدخل

Mall

م + جمع = مجمع

Prayer room

م + صلى = مصلى

Restaurant

م + طعم = مطعم

Airport

م + طار = مطار

Parking place

م + وقف = موقف

Bakery

م + خبز = مخبز