dumbbell
Longman Dictionary of Contemporary English 5++LDOCE 5++dumb·bell /ˈdʌmbel/ noun [countable] 
1. DSOtwo weights connected by a short bar, that you can lift to strengthen your arms and shoulders 哑铃 SYN weights →5 see picture at 见图 gym2. STUPID/NOT INTELLIGENT American English informal someone who is stupid 笨蛋，傻瓜
1. DSOtwo weights connected by a short bar, that you can lift to strengthen your arms and shoulders 哑铃 SYN weights →5 see picture at 见图 gym2. STUPID/NOT INTELLIGENT American English informal someone who is stupid 笨蛋，傻瓜Examples from the Corpus
dumbbell• He had undressed forty-five-pound weight bars, stacked plates, and dumbbells on the floor.• Rigoulet, the strong man, strains at his dumbbell.• I raised it, as some sweating weight lifter might raise above his head his dumbbells of iron.• Slowly straighten the arm by lifting the dumbbell backwards, keeping the upper arm still.• Dumb-bell curls should always involve rotation of the dumbbells.• He works out with dumbbells in the prison gym.dumb·bell nounChineseSyllable
you two that short a bar, by Corpus connected weights
dumbbell
dumb‧bell /ˈdʌmbel/
noun [countable]
1. two weights connected by a short bar, that you can lift to strengthen your arms and shoulders
SYN weights
2. American English informal someone who is stupid
dumb‧bell /ˈdʌmbel/
noun [countable]1. two weights connected by a short bar, that you can lift to strengthen your arms and shoulders
SYN weights
2. American English informal someone who is stupid