activate

[1]	trip , move , actuate , set in motion , get started , set off , spark off , energize , get/set going , spark , trigger off , start , initiate , touch off , switch/turn on , trigger , motivate , rouse , arouse , prompt , stimulate , stir , mobilize , animate , impel , galvanize , (Colloq) (US) light a fire under
[2]	aerate