Latin word fundus comes from Proto-Indo-European *bʰudʰ-

Detailed word origin of fundus

Dictionary entry	Language	Definition
*bʰudʰ-	Proto-Indo-European (ine-pro)	to (be) awake
*bʰudʰ-(m)n-o	Proto-Indo-European (ine-pro)
fundus	Latin (lat)	An authority. Bottom. Farm; piece of land; estate. Foundation. Ground.