de·ter

[dih-tur]
verb (used with object), de·terred, de·ter·ring.
1.
to discourage or restrain from acting or proceeding: The large dog deterred trespassers.
2.
to prevent; check; arrest: timber treated with creosote to deter rot.

Origin:
1570–80; < Latin dēterrēre to prevent, hinder, equivalent to dē- de- + terrēre to frighten

de·ter·ment, noun
de·ter·ra·ble, adjective
de·ter·ra·bil·i·ty, noun
de·ter·rer, noun
un·de·ter·ra·bil·i·ty, noun
un·de·ter·ra·ble, adjective
un·de·ter·ra·b·ly, adverb
un·de·terred, adjective
un·de·ter·ring, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To deter
00:10
Deter is a PSAT word you need to know.
So is acrid. Does it mean:
Pleased, esp. with oneself or one's merits, advantages, situation, etc., often without awareness of some potential danger or defect; self-satisfied a complacent smile.
harsh smelling or tasting
Collins
World English Dictionary
deter (dɪˈtɜː) [Click for IPA pronunciation guide]
 
vb , -ters, -terring, -terred
(tr) to discourage (from acting) or prevent (from occurring), usually by instilling fear, doubt, or anxiety
 
[C16: from Latin dēterrēre, from de- + terrēre to frighten]
 
de'terment
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

deter
1579, from L. deterrere, from de- "away" + terrere "frighten." Deterrent is from 1829.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Red tape, petty protectionism, restrictive labour laws and confusion between
  different levels of government deter investment.
Many wild seeds evolved to be bitter, bad-tasting, or actually poisonous to
  deter animals from eating them.
It creates several new procedures to deter or defeat bad patents.
Grocers putting electronic tags on sirloin to deter shoplifters.
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