-illus

Rebracketing of diminutive suffix -lus on such nouns as sigillum (signum + -lus), used freely.

• (Classical Latin) IPA^(key): /ˈil.lus/, [ˈɪlːʲʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈil.lus/, [ˈilːus]

-illus

1. Used to form diminutives of nouns.

The suffix -illus and variants (-illa, -illum) are used almost invariably to create the diminutive form of a noun.

Examples:

furcilla (“very small fork”), from furca (“fork”)

lapillus (“very small stone, pebble, gem”), from lapis (“stone”)

pūnctillum (“very small dot”), from punctum (“point, spot”)

First/second-declension adjective.

• Sicilian: -iḍḍu, -illu
• Spanish: -illo