Where does “trufa” come from?

trufa (Occitan) comes from Vulgar Latin tufera, from Latin tūber, from Proto-Italic tūβos, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

Ancestry of “trufa”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	tufera	—
2	Latin	tūber	a hump, bump, swelling, protuberance; excrescence
3	Proto-Italic	tūβos	—
4	Proto-Indo-European	tewh₂-	to swell; to crowd; to be strong

Words derived from “trufa”

trifle
trifling
truffle
trifler
truffled
triflingly
triflest
truffling
triflingness
trufflelike
truffly
truffe
trufle
truffière
tryffel
trufă
Trüffel
trifle
triful
trifel
truyfle
trefle
trufful
truffier

Every word from Proto-Indo-European tewh₂- →Every word from Proto-Italic tūβos →Every word from Latin tūber →