This is the 12577th most frequent Russian word.
комфортную
The Russian word "комфортную" translates to "comfortable" in English (feminine singular accusative form).
Here, 'комфортную' is used as an adjective describing 'мебель' (furniture), indicating the furniture is comfortable.
Мы выбрали комфортную мебель для гостиной.
We chose comfortable furniture for the living room.
In this sentence, 'комфортную' describes 'атмосферу' (atmosphere), expressing the pleasant and welcoming environment generated.
Она создала комфортную атмосферу на вечеринке.
She created a comfortable atmosphere at the party.
The usage of 'комфортную' modifies 'одежду' (clothing), suggesting the clothing should provide comfort for the activity.