Trip is defined as to catch your foot or someone else's on something and stumble or fall, or to make a mistake or to catch someone else in a mistake.
The definition of actuate is the act of putting something into motion.
To spark a response, especially a negative emotional response, in (someone)
To turn on.
To spark is to emit little electrical currents or signals, or to emit little bursts of fire or light.
put in motion or move to act
Find another word for spark-off. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for spark-off, like: trip, actuate, trigger, activate, set off, spark, trigger off and touch off.