Where does “expingere” come from?

expingere (Latin) comes from Latin pingere, from Latin pingo, from Latin pango, from Proto-Italic pangō, from Proto-Indo-European peh₂ǵ- — to attach.

Ancestry of “expingere”, step by step

Step	Language	Word	Meaning
1	Latin	pingere	second-person singular future passive indicative...
2	Latin	pingo	I decorate or embellish; I paint, tint or colour;...
3	Latin	pango	I fasten, fix, set, especially drive, sink, force...
4	Proto-Italic	pangō	to fasten, to fix
5	Proto-Indo-European	peh₂ǵ-	to attach

expingere — Etymology, Origin & Word History | Etymology Explorer