This is the 9663rd most frequent Russian word.
чебоксарах
"Чебоксарах" is the prepositional case plural form of "Чебоксары," referring to the city of Cheboksary in Russia.
In this sentence, 'чебоксарах' indicates location, specifying the city where the action took place.
Я был в Чебоксарах на выходных.
I was in Cheboksary over the weekend.
Here, 'чебоксарах' again denotes the location where the event happened.
В Чебоксарах открыли новый музей.
A new museum was opened in Cheboksary.
In this case, 'чебоксарах' is used to refer to the city as the place of residence for the subject's friend.