Middle English word lofti comes from Proto-Indo-European *lewp-

Detailed word origin of lofti

Dictionary entry	Language	Definition
*lewp-	Proto-Indo-European (ine-pro)
*luftuz	Proto-Germanic (gem-pro)	Air. Atmosphere. Roof. Roof of the earth, firmament; heavens, sky.
lopt	Old Norse (non)
loft	Old English (ang)
lofti	Middle English (enm)

Words with the same origin as lofti