Question

tumble 【tumble】n.跌落；跌倒The crippled child tumbled down the stairs and was badly hurt.那跛脚的小孩从楼梯上跌下来，受伤很重。

Accepted Answer

['tʌmbl] 
tumblefall down, as if collapsing
When you tumble, you fall abruptly. You might trip over your shoelaces and tumble down a hill while flying a kite if you're not careful.
To suddenly topple over or trip and fall to the ground is to tumble. Toddlers often tumble in sandboxes, while running on sidewalks, or as they climb down stairs. There's another way to tumble that is more deliberate: the form of gymnastics that involves roundoffs and back handsprings is called tumbling, and if you're able to do these tricks, you can tumble. The root is believed to be the Old English tumbian, "to dance about."
All forms of 'tumble' will appear on average once every 242 pages.tumbletumblertumbling

Front	tumble
Pron	['tʌmbl]
Back	【tumble】n.跌落；跌倒 The crippled child tumbled down the stairs and was badly hurt. 那跛脚的小孩从楼梯上跌下来，受伤很重。
Vocab	tumblefall down, as if collapsing When you tumble, you fall abruptly. You might trip over your shoelaces and tumble down a hill while flying a kite if you're not careful. To suddenly topple over or trip and fall to the ground is to tumble. Toddlers often tumble in sandboxes, while running on sidewalks, or as they climb down stairs. There's another way to tumble that is more deliberate: the form of gymnastics that involves roundoffs and back handsprings is called tumbling, and if you're able to do these tricks, you can tumble. The root is believed to be the Old English tumbian, "to dance about." All forms of 'tumble' will appear on average once every 242 pages. tumble tumbler tumbling

Tumble Fall Trip Tʌmbl Tumble】N.跌落；跌倒 Crippled Child Tumbled