verb (used with object), de·terred, de·ter·ring.
to discourage or restrain from acting or proceeding: The large dog deterred trespassers.
to prevent; check; arrest: timber treated with creosote to deter rot.
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Origin of deter
1570–80; < Latin dēterrēre to prevent, hinder, equivalent to dē- de- + terrēre to frighten
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
verb -ters, -terring or -terred
(tr) to discourage (from acting) or prevent (from occurring), usually by instilling fear, doubt, or anxiety
Word Origin for deter
C16: from Latin dēterrēre, from de- + terrēre to frighten
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper