adjective, deep·er, deep·est.
adverb, deep·er, deep·est.
- to enter upon a course of action with heedless or irresponsible indifference to consequences.
- to become emotionally overwrought.
- inextricably involved.
- having made or committed oneself to make a large financial investment.
- in difficult or serious circumstances; in trouble.
- in a situation beyond the range of one's capability or skill: You're a good student, but you'll be in deep water in medical school.
Origin of deep
Synonyms for deep
Antonyms for deep
- (postpositive)of a specified dimension downwards, inwards, or backwardssix feet deep
- (in combination)a six-foot-deep trench
- to lose one's temper; react angrily
- mainly USto act rashly
- a poetic term for the ocean
- cricketthe area of the field relatively far from the pitch
Word Origin for deep
Old English deop "deep water," especially the sea, from the source of deep (adj.).
Old English deop "profound, awful, mysterious; serious, solemn; deepness, depth," deope (adv.), from Proto-Germanic *deupaz (cf. 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" (cf. 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).
Seriously involved; far advanced. For example, He was in deep with the other merchants and couldn't strike out on his own, or She used her credit cards for everything, and before long she was in deep.
in deep water. Also, in over one's head. In trouble, with more difficulties than one can manage, as in The business was in deep water after the president resigned, or I'm afraid Bill got in over his head. These metaphoric expressions transfer the difficulties of being submerged to other problems. The first appears in Miles Coverdale's 1535 translation of the Book of Psalms (68:13): “I am come into deep waters.” The second, which also can signify being involved with more than one can understand, dates from the 1600s. Also see over one's head.
In addition to the idioms beginning with deep
- deep down
- deep end
- deep pocket
- deep six
- deep water
- beauty is only skin deep
- between a rock and a hard place (devil and deep blue sea)
- go off the deep end
- in deep
- still waters run deep