This is the 5918th most frequent Russian word.
рубашке
The Russian word "рубашке" is the dative or prepositional case of "рубашка," which means "shirt" in English.
The word 'рубашке' is used as a dative singular form of the noun 'рубашка' (shirt) in this sentence.
Вчера я купил новую рубашке.
Yesterday, I bought a new shirt.
Here, 'рубашке' is in the prepositional case, describing the location or medium (wearing) of the noun 'рубашка'.
На вечеринке она была в красивой рубашке.
At the party, she was wearing a beautiful shirt.
In this case, 'рубашке' is in the dative singular case, showing the indirect object of the action.