ex·tin·guish 
(ĭk-stĭnggwĭsh)
(ĭk-stĭnggwĭsh)tr.v. ex·tin·guished, ex·tin·guish·ing, ex·tin·guish·es
1. To cause (a fire or light) to stop burning or shining; put out.
2. To put an end to or make extinct; destroy: "Her death extinguished the dream of family that was closest to his heart" (Karen Lystra). See Synonyms at annihilate.
3. Psychology To bring about the extinction of (a conditioned response).
[Latin exstinguere : ex-, intensive pref.; see EX- + stinguere, to quench; see steig- in the Appendix of Indo-European roots.]
ex·tinguish·a·ble adj.
ex·tinguish·ment n.