Warmth — physical warmth or the feeling of comfort due to temperature; also the abstract warmth of a person's kindness or friendliness.
部屋の暖かさを確かめてからエアコンを切った。
I checked the room's warmth before turning off the air conditioner.
母の手の暖かさに安心した。
I felt reassured by the warmth of my mother's hands.
彼の言葉には人を励ます暖かさがある。
There is a warmth in his words that encourages people.