Questions & Answers about Siz de yol arkadaşı arıyorsanız, bana yazın.
Because the object is indefinite (“a travel companion”), and in Turkish indefinite direct objects appear without the accusative. The -ı in arkadaşı is the compound’s possessive, not the accusative. If you make it definite, you add accusative to the whole phrase:
- Indefinite: Yol arkadaşı arıyorum = I’m looking for a travel companion.
- Definite: Yol arkadaşını arıyorum = I’m looking for the travel companion (that we both know about).