A charcoal-powered heating brazier.

warm a person or room

cold

cold, chilly / (by extension) poor, poverty-stricken / midwinter, cold season

cold, coldness / midwinter, cold season

cold (ambient temperature, as a winter day is cold) / (figuratively) fearful / (of a joke) terrible; not funny

coldness / chill

room (of a house or hotel), chamber, apartment, flat / (sumo) a stable where rikishi live and train together under a shisho oyakata (stable master)

winter

winter (season)