-sy Definition
 sē, zē 
    affix
  
 Forming adjectives and nouns with diminutive, and often mocking or pejorative, force.
 Artsy, cutesy.
 Webster's New World 
    abbreviation
  
 Steam Yacht - steam-powered yacht.
Wiktionary 
Sailing Yacht - wind-powered yacht.
Wiktionary 
School year.
 Wiktionary 
(astronomy) Seyfert galaxy, a type of AGN class of active galaxy.
Wiktionary 
    pronoun
  
 Alternative form of Si.
Wiktionary 

