This is the 8056th most frequent Russian word.
крыме
"Крыме" is the prepositional case of "Крым," meaning "in Crimea" (a region).
The word 'Крыме' refers to the location 'Crimea', used in the prepositional case to describe where the action took place.
Мы проводили отпуск в Крыме.
We spent our vacation in Crimea.
Here, the word 'Крыме' is in the prepositional case, indicating the place associated with the action described in the question.
Ты был в Крыме прошлым летом?
Were you in Crimea last summer?
The use of 'Крыме' again demonstrates the prepositional case, forming a part of the infinitive construct 'побывать в Крыме' (to visit in Crimea).