touch off

Verb

1.

touch off - put in motion or move to act; "trigger a reaction"; "actuate the circuits" Synonyms: activate, actuate, set off, spark, spark off, trigger, trigger off, trip

activate, actuate, come about, fall out, go on, hap, happen, initiate, occur, pass, pass off, pioneer, set off, spark, spark off, take place, trigger, trigger off, trip