1. deterrent -- (tending to deter; "the deterrent effects of high prices")
deterrent can be used as a noun
1. hindrance, hinderance, deterrent, impediment, balk, baulk, check, handicap -- (something immaterial that interferes with or delays action or progress)
1.
--There's one thing it hasn't a deterrent effect on, says Alf. - from Ulysses by James Joyce