Learn Farsi: مبادله‌ی اطلاعات برایم مهم است. - The exchange of information is important to me.

The word mobâdele (exchange) is built from the Arabic root letters b-d-l (related to changing or substituting, as seen in the word tabdil). By plugging these three consonants into the mo-C1-â-C2-a-C3 pattern (which takes an -e ending in Farsi instead of the Arabic feminine ending), we get mobâdele. This pattern indicates mutual action or engagement, which perfectly describes the reciprocal nature of an exchange.

Why is there a ye at the end of mobâdele in this sentence?

The base word mobâdele ends in a silent 'heh', which produces the final 'e' sound. To connect it to ettelâ'ât (information) using the ezâfe (meaning "exchange of"), we must add a spoken 'y' sound to bridge the vowels. In modern writing, this is usually shown by adding a ye character (or sometimes a floating hamze) right after the silent 'heh', resulting in mobâdeleye.

Since ettelâ'ât is plural, why is the verb ast singular?

While ettelâ'ât is indeed the plural form of ettelâ' (using the Arabic plural suffix -ât), it is not the main subject of the sentence. The core subject is the singular noun mobâdele (the exchange). The verb ast (is) agrees with the singular "exchange", not the "information" being exchanged.

Could I use barâ-ye man instead of the combined form barâyam?