This is the 17946th most frequent Russian word.
уютом
"Уютом" is the instrumental case of "уют," meaning "coziness" or "comfort."
Here, 'уютом' is used to describe the comfort and coziness of a home environment.
Он наслаждался уютом своего дома.
He enjoyed the coziness of his home.
In this sentence, 'уютом' is associated with the atmosphere in the room brought about by lighting.
Мягкий свет лампы создавал в комнате уютом и теплотой.
The soft light of the lamp created cozy comfort and warmth in the room.
'Уютом' here expresses the quality of comfort and homeliness associated with winter evenings.