Where does “paenīnsula” come from?

paenīnsula (Latin) comes from Latin paene, from Proto-Indo-European peh₁- — to hate, hurt.

Ancestry of “paenīnsula”, step by step

Step	Language	Word	Meaning
1	Latin	paene	almost, nearly; scarcely, hardly, barely
2	Proto-Indo-European	peh₁-	to hate, hurt

paenīnsula — Etymology, Origin & Word History | Etymology Explorer