This is the 10546th most frequent Turkish word.
böceğin
"Of the bug" or "the bug's" (possessive form of "böcek").
This illustrates one of the possessive forms, indicating that the wings belong to the insect.
Böceğin kanatları çok inceymiş.
The insect's wings are very thin.
Here 'böceğin' is in the possessive form to indicate something that belongs to or is part of the insect.
Bahçede böceğin üzerine basmamaya dikkat etmelisin.
You should be careful not to step on the insect in the garden.
The possessive case is used here to describe a characteristic or property of the insect.