This is the 12853rd most frequent Russian word.
кухню
The Russian word "кухню" is the accusative form of "кухня," meaning "kitchen."
In this sentence, 'кухню' refers to the physical kitchen space or set, such as furniture and appliances, recently acquired for the apartment.
Я купил новую кухню для своей квартиры.
I bought a new kitchen for my apartment.
Here, 'кухню' is used to denote the physical area of the kitchen where activities like cooking take place, and the instruction is cleaning it.
Мама попросила меня убрать кухню.
Mom asked me to clean the kitchen.
In this example, 'кухню' refers metaphorically to the cuisine or cooking traditions of Italy.