Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Latin
Origin: deterrere, from terrere 'to frighten'

deter

verb
     
de‧ter past tense and past participle deterred, present participle deterring [transitive]
to stop someone from doing something, by making them realize it will be difficult or have bad results [↪ deterrent]:
The company's financial difficulties have deterred potential investors.
deter somebody from (doing) something
The security camera was installed to deter people from stealing.
! Do not say 'deter someone to do something'. Say deter someone from doing something.

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