Deterrent

[dɪ'ter(ə)nt] or [dɪ'tɝənt]

(adj.) tending to deter; 'the deterrent effects of high prices' .

Checked by Elton--From WordNet

(a.) Serving to deter.

(n.) That which deters or prevents.

Checked by Bernadette

adj. serving to deter.—n. anything that deters or prevents.

Checker: Virgil