Questions & Answers about Komodinin üstündeki gece lambası hâlâ açık.
Because it is in the genitive case, which often corresponds to of the ... in English.
- komodin = nightstand / bedside table
- komodinin = of the nightstand
In this sentence, Turkish is building the expression:
- komodinin üstü = the top of the nightstand
- komodinin üstündeki ... = the ... that is on top of the nightstand
So -in marks komodin as the thing that the top belongs to.
Üstündeki is made from several pieces:
- üst = top, upper side
- üstü = its top / the top of it
- üstünde = on it / on its top
- üstündeki = the one that is on it / the one on top of it
So in this sentence:
- komodinin üstündeki gece lambası = the night lamp that is on top of the nightstand
The ending -ki turns the location phrase into something like an adjective. It lets Turkish say the lamp on the nightstand without using a separate relative pronoun like that or which.