Refers to a sense of warmth, often emotional or atmospheric, rather than just physical temperature. Commonly used for the warmth of a person's character, a handmade object, or a welcoming atmosphere.
彼女の笑顔には温かみがある。
Her smile has a warmth to it.
This handmade furniture gives a sense of warmth.
This sweater has the warmth of something handmade.
I felt warmth in his words.
She speaks in a warm voice.
This room is functional but lacks warmth.