Warm
Mild, Warmth
noun, な adjective
Warm warm is warm.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
今年の冬は例年よりも寒くて雪も凄く降ったけど、本当に地球は温暖化してるのかね。
This winter is unusually cold and we have had tons of snow, so is the earth really getting warmer?