activer

Etymology
From, both from.

Verb

 * 1)  to activate to encourage development or induce increased activity; to stimulate
 * 2)  to activate to put a device, mechanism or system into action or motion; to enable
 * 3)  to activate to render radioactive
 * 4)  to speed up
 * 5)  to stoke (e.g. a fire)