This is the 6111th most frequent Japanese word.
オシャレ
Stylish; fashionable.
In this sentence, 'オシャレ' is used as an attribute to describe the clothes as fashionable.
彼女はオシャレな服を着ています。
She is wearing stylish clothes.
Here, 'オシャレ' describes the room's trendy or stylish appearance.
彼の部屋はとてもオシャレですね。
His room is very trendy, isn't it?
'オシャレ' is used in a general sense to refer to the act of being stylish or fashionable.