warmth
暖 centers on gentle, comfortable heat: warmth that soothes and makes things pleasant.
暖 combines 日 (sun) with 爰, which likely contributes the sound and the idea of gentle pulling or drawing out, suggesting the sun drawing out warmth.
The sun 日 on the left and the right part 爰 (which looks like a hand reaching down) together suggest the sun's rays reaching down to warm the earth.
For ダン, imagine a warm down blanket: down -> ダン, and the sun's warmth feels like a cozy down blanket.
warm; mild; (pleasantly) hot
warm; mild; temperate
(indoor) heating
warm; mild; genial
(short) curtain hung at shop entrance; split curtain used to divide spaces in a house
warming; warmth
cold and heat; (degree of) temperature
fireplace; hearth; stove
air conditioning and heating
warmth
mild winter; warm winter
lukewarm; tepid; disagreeably warm (e.g. bath)
warm colour; warm color
warmth; warm weather
warm district; region of mild climate
warm current
spiritual enlightenment only comes through personal experience
short split entrance curtain
regional air-conditioning; community air-conditioning; district heating and cooling
district heating