Where does “stilo” come from?

stilo (Italian) comes from Italian -are, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

stilo (Italian): style; beam; needle, stylus

Definitions

Step	Language	Word	Meaning
1	Italian	-are	Used, with a stem, to form the infinitive of most...
2	Latin	-ō	suffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
3	Proto-Indo-European	-ō	Derives nouns from roots