1. Set in motion, start an event or prepare the way for
   "Hitler's attack on Poland led up to World War II"
   - initiate

Derived forms: leading up, leads up, led up

Type of: initiate, originate, start

• retrograde
• retrograde amnesia
• retrogress
• retrogression
• retrogressive
• retromandibular vein
• retronym
• Retrophyllum
• retrorocket
• retrorse
• retrospect
• retrospection
• retrospective
• retrospectively
• retroussé
• retroversion
• retrovert
• Retrovir
• retrovirus
• retrovision
• retry
• retsina
• return
• return address
• return key