The full table
Prefixes change the meaning; endings change the size or the feeling.
| not | incapace, impossibile, illegale, irregolare |
| not, undo | disonesto, disfare, scontento, scaricare |
| again, back | rifare, rileggere, ritornare |
| when, where | pre-, post-, sotto-, sopra-/sovra-, inter- |
| how much, with | anti-, extra-, ultra-, stra-, co-/con- |
| small · big · bad | gattino, casetta · librone · tempaccio |
Il- and ir- double the consonant: illegale, irregolare. Sopra- and sovra- usually do too: sopravvalutare.
-one often makes a feminine noun masculine: la porta → il portone.
Look-alikes: mulino (mill), lampone (raspberry), burrone (ravine).