Learn Farsi: ابزار انحصاری‌ای را که اینجا می‌بینی، خریدم. - I bought the exclusive tool that you see here.

In this structure, the phrase abzâr-e enhesâri-i (a particular exclusive tool) is the direct object of the main verb kharidam (I bought). When a direct object is modified by a relative clause starting with ke, the object marker râ is placed immediately after the antecedent and its restrictive -i, right before ke.

Why is the restrictive -i attached to the adjective enhesâri instead of the noun abzâr?

The restrictive -i (which signals that a relative clause is coming to define the noun) attaches to the very end of the noun phrase. Because the noun abzâr is modified by the adjective enhesâri, the -i tacks onto the end of the adjective.

Why is the restrictive suffix written as ای here?

The adjective enhesâri ends in the vowel i. When adding the restrictive suffix -i to a word that already ends in a vowel, a phonetic spacer is needed. In Farsi script, this is written as ای and pronounced as an extra -i (making the ending sound like enhesâri-i).

Is it possible to add a pronoun to the verb mi-bini to mean 'that you see it'?

Yes! In Farsi, you will often see a 'resumptive pronoun' in relative clauses, which would make the verb (). However, when the item being described is the direct object of the relative clause, dropping that extra pronoun is completely natural and very common in everyday speech.