Where does “enésimo” come from?

enésimo (Spanish) comes from Spanish ene, from Spanish enero, from Old Spanish janero, from Vulgar Latin ienuārius, from Latin iānuārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

enésimo (Spanish): umpteenth of an unspecified large number

Definitions

umpteenth of an unspecified large number

Ancestry of “enésimo”, step by step

Step	Language	Word	Meaning
1	Spanish	ene	a huge amount of, lots of, many; a lot; The name...
2	Spanish	enero	January
3	Old Spanish	janero	January
4	Vulgar Latin	ienuārius	—
5	Latin	iānuārius	of January
6	Latin	-ārius	er
7	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

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