اول

اول

"اول" means "first."

Here, "اول" is used as an adverb indicating sequence, meaning "firstly" or "at first".

اول به کلاس رفتم.

Firstly, I went to the class.

In this sentence, "اول" shows a temporal context as part of the compound phrase "اولِ هفته", meaning "the beginning of the week".

اولِ هفته به گردش می‌رویم.

At the beginning of the week, we will go on an excursion.

"اول" is integrated into the adjective "اولین", indicating an ordinal number, meaning "the first".

اولین بار است که به این شهر آمده‌ام.

It is the first time I have come to this city.