温かい
あたたかい · atatakai · JLPT N3 · i-adj
warm
☕ atatakai sounds like a tot o' chai, a small warming cup
温 is the same kanji as in 温泉 (onsen, hot spring). The 温かい spelling is for warm things you touch or taste, like a drink, food or a hand. Warm weather and rooms are written 暖かい.