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suck

[suhk]
verb (used with object)
1.
to draw into the mouth by producing a partial vacuum by action of the lips and tongue: to suck lemonade through a straw.
2.
to draw (water, moisture, air, etc.) by or as if by suction: Plants suck moisture from the earth. The pump sucked water from the basement.
3.
to apply the lips or mouth to and draw upon by producing a partial vacuum, especially for extracting fluid contents: to suck an orange.
4.
to put into the mouth and draw upon: to suck one's thumb.
5.
to take into the mouth and dissolve by the action of the tongue, saliva, etc.: to suck a piece of candy.
6.
to render or bring to a specified condition by or as if by sucking.
verb (used without object)
7.
to draw something in by producing a partial vacuum in the mouth, especially to draw milk from the breast.
8.
to draw or be drawn by or as if by suction.
9.
(of a pump) to draw air instead of water, as when the water is low or a valve is defective.
10.
Slang. to behave in a fawning manner (usually followed by around ).
11.
Slang. to be repellent or disgusting: Poverty sucks.
noun
12.
an act or instance of sucking.
13.
a sucking force.
14.
the sound produced by sucking.
15.
that which is sucked; nourishment drawn from the breast.
16.
a small drink; sip.
17.
a whirlpool.
Verb phrases
18.
suck in, Slang. to deceive; cheat; defraud: The confidence man sucked us all in.
19.
suck off, Slang: Vulgar. to fellate.
20.
suck up, Slang. to be obsequious; toady: The workers are all sucking up to him because he's the one who decides who'll get the bonuses.
Idioms
21.
suck face, to engage in soul-kissing.

Origin:
before 900; (v.) Middle English souken, Old English sūcan, cognate with Latin sūgere; (noun) Middle English souke act of suckling, derivative of the noun; akin to soak

suckless, adjective
outsuck, verb (used with object)
unsucked, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
suck (sʌk)
 
vb
1.  to draw (a liquid or other substance) into the mouth by creating a partial vacuum in the mouth
2.  to draw in (fluid, etc) by or as if by a similar action: plants suck moisture from the soil
3.  to drink milk from (a mother's breast); suckle
4.  (tr) to extract fluid content from (a solid food): to suck a lemon
5.  (tr) to take into the mouth and moisten, dissolve, or roll around with the tongue: to suck one's thumb
6.  (tr; often foll by down, in, etc) to draw by using irresistible force: the whirlpool sucked him down
7.  (intr) (of a pump) to draw in air because of a low supply level or leaking valves, pipes, etc
8.  (tr) to assimilate or acquire (knowledge, comfort, etc)
9.  slang (intr) to be contemptible or disgusting
10.  informal sucking diesel doing very well; successful
11.  informal suck it and see to try something to find out what it is, what it is like, or how it works
 
n
12.  the act or an instance of sucking
13.  something that is sucked, esp milk from the mother's breast
14.  give suck to to give (a baby or young animal) milk from the breast or udder
15.  an attracting or sucking force: the suck of the whirlpool was very strong
16.  a sound caused by sucking
 
[Old English sūcan; related to Old Norse súga, Middle Dutch sūgen, Latin sūgere to suck, exhaust; see soak]
 
'suckless
 
adj

sucking (ˈsʌkɪŋ)
 
adj
1.  not yet weaned: sucking pig
2.  not yet fledged: sucking dove

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

suck
O.E. sucan, from PIE root *sug-/*suk- of imitative origin (cf. O.S., O.H.G. sugan, O.N. suga, M.Du. sughen, Du. zuigen, Ger. saugen "to suck;" L. sugere "to suck," succus "juice, sap;" O.Ir. sugim, Welsh sugno "to suck"). Meaning "do fellatio" is first recorded 1928. Slang sense of "be contemptible"
first attested 1971 (the underlying notion is of fellatio). Suck eggs is from 1906. Suck hind tit "be inferior" is Amer.Eng. slang first recorded 1940.
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica
Encyclopedia

sucking

drawing of fluids into the mouth by creating a vacuum pressure in the oral cavity. Mammalian infants rely on this method of food ingestion until they are capable of eating more solid substances. A partial vacuum is created in the oral cavity by retracting the tongue to the back of the mouth. The rear portion of the tongue seals against the roof of the mouth, allowing liquids to be drawn into the front region. When the oral cavity is full, the tongue relaxes, and fluids flow back to the throat to be swallowed.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
It seems to me the mosquito release a liquid to facilitate sucking the blood.
Sucking insects, primarily leafhoppers, transmit this disease that infects
  asters and many other plants.
It can even make infestations by sucking insects worse by destroying their
  natural enemies.
Prey touch tiny trigger hairs that release the door, which opens inward,
  sucking in the prey to their doom.
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