Where does “quinary” come from?

quinary (English) comes from Latin quīnārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

quinary (English): Of fifth rank or order; Consisting of five...

Definitions

Of fifth rank or order; Consisting of five...

Ancestry of “quinary”, step by step

Step	Language	Word	Meaning
1	Latin	quīnārius	Containing or consisting of five things
2	Latin	-ārius	er
3	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Words derived from “quinary”

biquinary
quinarily

Every word from Proto-Italic *-āzios →Every word from Latin -ārius →Every word from Latin quīnārius →