Extinguish

verb

1. To put out, as in fire; to end burning; to quench
2. To destroy or abolish something

   "She extinguished all my hopes."

3. To obscure or eclipse something

   "The rays of the sun were extinguished by the thunder clouds."

4. To bring about the extinction of a conditioned reflex

   "Many patients can extinguish their phobias after a few months of treatment."

5. To hunt down (a species) to extinction