This is the 683rd most frequent Russian word.
крыма
The word "крыма" is the genitive case of "Крым," meaning "of Crimea" in English.
The word 'Крыма' is in the genitive case, showing possession or relation to Crimea, the proper noun.
История Крыма очень интересна.
The history of Crimea is very interesting.
The word 'Крым' is in the accusative case here, as it is the object of the preposition 'в' indicating direction and destination.
Я мечтаю о поездке в Крым.
I dream of a trip to Crimea.
The word 'Крыма' is in the genitive case, used here to indicate origin after the preposition 'из'.