Learn Turkish: Bu turda hangimiz kiminle eşleşiyor? - In this round, which of us is pairing up with whom?

The root word is hangi, meaning "which". By adding the 1st person plural possessive suffix -miz (our), it becomes "which of us" (literally "our which").

If hangimiz means "which of us", why does the verb eşleşiyor not have a plural or "we" ending?

Even though the group is "us" (plural), the subject performing the action is "which one" (singular). Because we are asking about a single person from our group pairing up, the verb takes the regular 3rd person singular present continuous ending -iyor.

Why does "with whom" translate to kiminle instead of just kimle?

You can actually say kimle and be perfectly understood! However, it is much more common and grammatically standard in Turkish to add the genitive (possessive) suffix -in to the word kim (who) before adding the "with" suffix -le, making it kiminle.

How is the verb eşleşiyor formed?

It comes from the noun eş, which means "mate", "partner", or "pair". The suffix -leş turns nouns into verbs that often show a mutual action or becoming something. So eşleşmek means "to pair up" or "to match". We then drop the infinitive and add the present continuous suffix -iyor.