热气球 rèqìqiú HSK7 hot-air balloon Origin Definitions Defs Strokes Stroke Words Sentences Sents 热 熱 rè adjective hot hot in temperature; feeling hot; the opposite of 冷 lěng气球 氣球 qìqiú noun balloon A bag made of rubber, plastic, or similar material, filled with air or a gas lighter than air such as helium; used as a toy or for scientific and military purposes.