| 1 | Latin | laetitia | joy, gladness, happiness, pleasure, delight |
| 2 | Latin | -itia | -ness, -ity |
| 3 | Latin | -ia | Used to form a feminine abstract noun, usually... |
| 4 | Latin | -ius | forming adjectives from nouns; nominative neuter... |
| 5 | Proto-Italic | -jōs | Forms comparative adjectives |
| 6 | Proto-Indo-European | -yós | Creates adjectives from noun or verb stems |