dumbbell

n. 哑铃
【医】 哑铃

dumb.bell

n.（名词）
A weight consisting of a short bar with a metal ball or disk at each end that is lifted for muscular development and exercise.
哑铃：短柄两端各有一金属球或盘的重物，用来举起以发展和锻炼肌肉
Slang A person regarded as stupid.
【俚语】 笨蛋

来源：
[From an apparatus similar to that used in ringing a church bell, but without the bell, used for practice or physical exercise]
[来自一种类似教堂敲钟用具的器具，但无铃，用来进行身体锻练]