Learn Hardcore Turkish: Pasaportu yanınızda getirmelisiniz. - You should bring the passport with you.

The suffix -u is the accusative case marker for a definite direct object in Turkish. Since “the passport” here is a specific item you must bring, it takes the accusative -u. If it were indefinite (“a passport”), you would say pasaport without -u.

Why isn’t there a possessive suffix on pasaportu to show “your passport”?

Context and the rest of the sentence already imply that it’s your passport. You have the polite -ınız on yanınızda, so the possessor is clear. If you want to be explicit, you can say pasaportunuzu (pasaport-un-uz-u).

What does yanınızda mean, and how is it formed?

yanınızda means “by your side” or “with you.” It breaks down as:
• yan (side)
• -ınız (2nd-person-pl./polite possession “your”)
• -da (locative case “at/in/on”)

Why is the polite/plural “you” used here?

Turkish uses -siniz (or -nız) to address either multiple people or a single person formally/politely. That politeness extends to yanınızda (“your side”) and the verb ending -melisiniz (“you must”).

What is the structure and meaning of getirmelisiniz?