Where does “sesqualter” come from?

sesqualter (Latin) comes from Latin sēsqui-, from Latin -que, from Proto-Italic -kʷe, from Proto-Indo-European -kʷe — and; Forms distributives from interrogatives.

Ancestry of “sesqualter”, step by step

Step	Language	Word	Meaning
1	Latin	sēsqui-	1½; 1½ times, increased by 50%
2	Latin	-que	and, a copulative particle affixed to the word it...
3	Proto-Italic	-kʷe	and; Forms distributives from interrogatives
4	Proto-Indo-European	-kʷe	and; Forms distributives from interrogatives

Words derived from “sesqualter”

sesquialterate

Every word from Proto-Indo-European -kʷe →Every word from Latin -que →Every word from Latin sēsqui- →