balloon/bə'luːn/

n. a small, thin rubber bag that becomes larger when you blow air into it

n. [C] 气球：Mike is blowing up a balloon 迈克在吹气球。

◇burst a balloon 弄破气球

◇He let the air out of the balloon. 他把气球里的气放掉了。

构词ball + oon

音组-oon/-uːn/

afternoon; balloon; cartoon; typhoon; moon; noon; soon; spoon