Where does “trenta-u” come from?

trenta-u (Catalan) comes from Catalan trenta, from Old Catalan trenta, from Latin trīgintā, from Proto-Indo-European tridḱómt, from Proto-Indo-European tri-, from Proto-Indo-European tréyes — three.

trenta-u (Catalan): thirty-one

Definitions

thirty-one

Ancestry of “trenta-u”, step by step

trenta-u traces back through two separate lines of ancestry.

via Catalan trenta

Step	Language	Word	Meaning
1	Catalan	trenta	thirty
2	Old Catalan	trenta	—
3	Latin	trīgintā	thirty; 30
4	Proto-Indo-European	tridḱómt	thirty
5	Proto-Indo-European	tri-	three, threefold
6	Proto-Indo-European	tréyes	three

via Catalan u

Step	Language	Word	Meaning
1	Catalan	u	The Latin letter U; one
2	Latin	ūnus	one, single
3	Old Latin	oinos	one
4	Proto-Italic	oinos	cardinal number 1 Previous: n/a Next: *duō;...
5	Proto-Indo-European	óynos	one; single

Every word from Proto-Indo-European tréyes →Every word from Proto-Indo-European tri- →Every word from Proto-Indo-European tridḱómt →