A pronominal suffix is a suffix which is added to a noun, preposition, or verb. This suffix is translated as a pronoun. Start here.
a pronominal suffix on a noun is a possessive pronoun. video
a pronominal suffix on a verb is that verb’s object. video or p450 in KHW
a pronominal suffix on a preposition is the object of that preposition. video or p454 in KHW
Note:
Any noun with a pronominal suffix is considered definite.
When attached to a noun, a pronominal suffix is understood to be in construct with the noun to which it is attached. Therefore, it follows that only nouns in the construct state take pronominal suffixes.