tumble /ˈtʌmbl/ vi. & vt. 1. 跌倒，摔下，滚下：tumble off horse 从马上摔下来，堕马 A sudden braking tumbled him down. 急刹车使他摔倒了。 2.翻滚：Thoughts were tumbling about in her mind. 各种思想在她脑海里翻腾。 3.不由自主地卷入：Jim tumbled for Mary the first time he met her. 吉姆对玛丽一见钟情。 4.(气温，价格等)暴跌：The temperature tumbled to 10 degrees last night. 昨天夜里气温猛掉到10度。5. 用于短语动词 tumble down倒塌：The hut tumbled down in the storm. 小屋在暴风中倒塌了。tumble over 被绊倒：tumble over a stump 在树桩上绊了一跤 tumble to (突然)明白，领悟：All of a sudden I tumbled to it. 我茅塞顿开。