1. PIE root *dhreu- "fall, drip, droop" => Old English dreosan (past participle droren) "fall" => Middle English dresen "fall".
2. PIE root *dhreu- "fall, drip, droop" => Proto-Germanic *drup- "fall, drop".
3. 由此推出同源词：drown; dreary; drizzle, drowsy; drip, drop, droop.
4. 谐音“找死” --- 你敢打瞌睡，是找死吗？---- 一个很霸气的老师看到一个学生在打瞌睡，于是说“你敢打瞌睡，是找死吗？”。
5. drowse-dr- dream-owse- browse（本意）徜徉在梦乡里: v打瞌睡---梦见周公。
6. 谐音“桌睡、装睡、抓睡”----趴在桌子上睡觉。
7. The etymological notion underlying drowsy seems to be of heaviness, with eyelids falling and the head nodding over the chest.
8. browse drowse: 书看累了，自然就会抓瞌睡。

1. She was no sensualist, longing to drowse sleepily in the lap of luxury.

她不是个肉欲主义者,想昏昏沉沉地过纸醉金迷的生活.

2. Oh, no! Looks like they catch me drowse.

喔, 糟了. 他们好像发觉我在打瞌睡.

3. Teach him to read, teach to midnight, chen Xian drowse, the head came up against screen.

教他读书, 教至半夜, 陈咸瞌睡, 头碰到了屏风.