precursor /prē-kûrˈsər/

1. Something that exists or goes in advance of another
2. An indication of the approach of an event
3. A forerunner, herald or harbinger
4. A predecessor
5. A substance from which the one in question is derived or manufactured (chem)

precurˈsive or precurˈsory adjective

• spersed
• sperses
• spersing
• sperst
• sperthe
• spessartine
• spessartines
• spessartite
• spessartites
• spet
• SPET
• Spet
• spetch
• spetches
• spets
• SPET scanner
• Spetsnaz
• Spetsnazes
• spetting
• Spetznaz
• Spetznazes
• spew
• spewed
• spewer
• spewers