Learn Farsi: من فردا سفیر را حضوراً در سفارت می‌بینم. - I will see the ambassador in person at the embassy tomorrow.

This is the Arabic accusative suffix "-an", which Farsi borrows to turn Arabic nouns or adjectives into adverbs of manner. Here, it changes the noun حضور (presence) into the adverb حضوراً (in person or personally).

How exactly do I pronounce حضوراً and what is the symbol on top of the last letter?

It is pronounced "hozuran". The double-dash symbol is called a tanvin, an Arabic diacritic used to write the "-an" sound. In Farsi, you will only see this suffix on words borrowed from Arabic, and it is almost always written over an alef (ا).

Is there a connection between the words سفیر (ambassador) and سفارت (embassy)?

Yes! Both are Arabic loanwords that share the same three-letter root: S-F-R (which is related to travel or journeying). Recognizing these shared Arabic root patterns is a great way to quickly guess and remember new vocabulary at this level.

The verb می‌بینم is present tense, but the translation says "I will see". Why isn't the formal future tense used here?

In both standard and conversational Farsi, the present tense is frequently used to talk about certain or planned future events, much like saying "I am seeing him tomorrow" in English. The time word فردا (tomorrow) provides all the future context needed, so a formal future tense verb is not required.