The Possessive suffix in Arabic is not a separate pronoun, like:
mine, yours, his, her, ours etc…
In Arabic the ending of a word changes the who it belongs to, by adding a suffix, male, female and plural.
When we add suffixes to the noun, we know who it belongs to.
bait is a house بيت
My house baiti بيتي
...
An office - maktabمكتب
My office maktabiمكتبي
Your office for a male - maktabakمكتبَك