Learn Farsi: ورزشکار استراحت کرد چون خدمتکار اتاق را تمیز می‌کرد. - The athlete rested because the maid was cleaning the room.

The suffix -kâr attaches to a noun to describe a person who does that activity as a profession or regular habit. varzesh means sport or exercise, so a varzeshkâr is an athlete. khedmat means service, making khedmatkâr someone who provides a service, like a maid or servant.

What is the difference between the suffixes -kâr (seen here) and -gar?

They both create nouns for professions or the doer of an action. The difference is mostly historical, but generally, -kâr attaches to nouns, while -gar often attaches to the present stem of verbs (for example, kârgar, meaning worker). Because these form fixed words, you do not need to build them yourself; just memorize which suffix a specific word uses.

Why is the first verb esterâhat kard but the second one is tamiz mi-kard with a mi- prefix?

This highlights the difference between a completed action and an ongoing action in the past. esterâhat kard is the simple past tense, describing the resting as a single event. tamiz mi-kard adds the continuous prefix mi- to show that the maid was in the middle of cleaning when this happened.

Why do we need the word râ after otâgh (room)?