保温

to keep hot / heat preservation

Bulgaria / Bulgarian / abbr. for 保加利亞|保加利亚[Bao3 jia1 li4 ya4]

to defend; to protect; to keep / to guarantee; to ensure / civil administration unit in the baojia 保甲[bao3 jia3] system (old)

surname Wen

warm / lukewarm / temperature / to warm up / mild / soft / tender / to review (a lesson etc) / fever (TCM) / old variant of 瘟[wen1]

thermos