deep: [OE] Deep is a member of a quite extensive and heterogeneous family of English words. It comes from a prehistoric Germanic *deupaz (source also of German tief, Dutch diep, and Swedish djup), which was a derivative of the base *d(e)u- ‘deep, hollow’. This may also have been the ancestor of the first syllable of dabchick ‘little grebe’ [16] (which would thus mean literally ‘diving duck’), while a nasalized version of it may underlie dimple. It produced dip, and a variant has given us dive. => dabchick, dimple, dip, dive
deep (adj.)
Old English deop "profound, awful, mysterious; serious, solemn; deepness, depth," deope (adv.), from Proto-Germanic *deupaz (cognates: Old Saxon diop, Old Frisian diap, Dutch diep, Old High German tiof, German tief, Old Norse djupr, Danish dyb, Swedish djup, Gothic diups "deep"), from PIE *dheub- "deep, hollow" (cognates: Lithuanian dubus "deep, hollow, Old Church Slavonic duno "bottom, foundation," Welsh dwfn "deep," Old Irish domun "world," via sense development from "bottom" to "foundation" to "earth" to "world").
Figurative senses were in Old English; extended 16c. to color, sound. Deep pocket "wealth" is from 1951. To go off the deep end "lose control of oneself" is slang first recorded 1921, probably in reference to the deep end of a swimming pool, where a person on the surface can no longer touch bottom. When 3-D films seemed destined to be the next wave and the biggest thing to hit cinema since talkies, they were known as deepies (1953).
deep (n.)
Old English deop "deep water," especially the sea, from the source of deep (adj.).
实用例句
1. The economy remains deep in recession with few signs of a pick-up.
经济仍深陷衰退之中，几乎没有好转的迹象。
来自柯林斯例句
2. Solid low-level waste will be disposed of deep underground.
放射性水平低的固体废料将做地下深埋处理。
来自柯林斯例句
3. Deep down, she supported her husband'sinvolvement in the organization.
在心底里，她支持丈夫参加这个组织。
来自柯林斯例句
4. Somewhere deep beneath the surface lay a caring character.
在内心深处的某个角落里埋藏着一颗爱心。
来自柯林斯例句
5. That's when I try to meditate or do some deep-breathing exercises.