Learn Farsi: نامزد در اجتماع عمومی صحبت کرد. - The candidate spoke in the public gathering.

The word ejtemâ' is built from the Arabic root j-m-' (ج-م-ع), which is about collecting or grouping (as seen in the simple noun jam'). By plugging these root letters into the e-C1-t-e-C2-â-C3 pattern, we get e-j-t-e-m-â-'. This Form VIII pattern often creates reflexive or resultant nouns. So, instead of the transitive act of collecting things, it describes the result of people collecting themselves: a gathering or society.

I've seen nâmzad used to mean "fiancé" or "fiancée". Why does it mean "candidate" here?

The word nâmzad literally translates to "name-struck" or "nominated". In a romantic context, it refers to someone nominated for marriage (a fiancé or fiancée). In a political or professional context like this one, it simply means someone nominated for a position, hence "candidate".

Should there be an ezafe linking ejtemâ' and omumi even though it isn't written?

Yes, you must pronounce it as ejtemâ'-e omumi. The ezafe (the short "e" sound connecting a noun to its adjective or possessor) is almost never written in the standard Persian script. Because omumi (public) describes ejtemâ' (gathering), you naturally need the invisible ezafe to link them.

What is the difference between using sohbat kard and another common verb for speaking, like harf zad, in this context?

While both mean "to speak" or "to talk", sohbat kardan is slightly more formal and is often used for delivering speeches, having discussions, or speaking in a professional setting. is more commonly used for everyday, casual talking or chatting.