The story
- Proto-Indo-European*bʰel-
- Proto-Indo-European*bʰl̥géh₁yeti
- Proto-Italic*folgēō
- Latinfulgeō
- Proto-Indo-European*dʰeh₁-
- Latinfulgidus
- English todayfulgid
From Latin fulgidus, derived from fulgere. By surface analysis, Latin fulg(ere) + -id.
Etymology from Wiktionary, CC BY-SA 4.0.