ADJECTIVE PREFIXES
Used with an adjective the prefixes in or im mean "not." Inimicus means "not friendly," because of in+amicus. The prefix per means "very."
  • imparatus-a-um
  • ingratus-a-um
  • pregratus-a-um
  • perlongus-a-um
  • permutes-a-um

ADJECTIVE SUFFIXES
The suffixes ia or tia are added sometimes to adjectives to make them a noun. Amicus+tia = amicitia, which means "friendship." Ia or tia mean 
"-ness" or "-ship." The suffix tas or tatis does the same thing.
  • brevitas, brevitatis f.
  • gratia, gratiae f.
  • gravitas, gravitates f.
  • inimicitia, inimicitiae f.
  • libertas, libertatis f.
  • miseria, miseriae f.
  • potentia, potentiae f.
  • veritas, veritatis f.