Dictionary.com
Thesaurus.com

-ity

American  
  1. a suffix used to form abstract nouns expressing state, condition, or quality: jollity; civility; Latinity; variability.


-ity British  

suffix

  1. indicating state or condition

    technicality

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of -ity

Variant of -itie, Middle English -ite < Old French < Latin -itāt- (stem of -itās ); in many words representing Latin -itās directly