1. Put in motion or move to act
   - trip, actuate, trigger, activate, set off, spark, trigger off, touch off

Derived forms: sparked off, sparks off, sparking off

Type of: initiate, pioneer

• stuffing box
• stuffing nut
• stuffy
• stull
• stultification
• stultify
• stum
• stumble
• stumblebum
• stumbler
• stumbling block
• stumm
• stump
• stump speech
• stump spud
• stumpage
• stumper
• stumping
• stumpknocker
• stumpy
• stun
• stun baton
• stun gun
• stung
• stunned