Persian Suffix گاه (-gâh) attaches to all forms of words including nouns, adjectives and stems. This suffix mainly means "place of" but in certain derivations it means "time of" (a particular point in time). گاه is a very productive suffix.
| Word | Derivation |
|---|---|
| ایست ist stop | ایستگاه istgâh stop, station |
| فروش foruš selling, sale | فروشگاه forušgâh department store |
| درمان darmân cure | درمانگاه darmângâh clinic |
| خواب xwâb sleep | خوابگاه xwâbgâh dormitory |
| آزمایش âzmâyeš test, examination | آزمایشگاه âzmâyešgâh laboratory |
| پالایش pâlâyeš refining | پالایشگاه pâlâyešgâh refinery |
| آرایش ârâyeš make-up | آرایشگاه ârâyešgâh hairdresser's, barber’s |
| کار kâr work | کارگاه kârgâh workshop |
| پژوهش pažuheš research | پژوهشگاه pažuhešgâh research house/institute |