fluorescer

Etymology tree
Proto-Indo-European *bʰel-der.
Proto-Indo-European *bʰlewH-der.
Proto-Indo-European *bʰluH-yé-ti?
Latin fluō
Proto-Indo-European *-os
Proto-Indo-European *-s
Proto-Indo-European *-ōs
Proto-Italic *-ōs
Latin -or
Latin fluorbor.
English fluor
Proto-Indo-European *-tósder.
Ancient Greek -της (-tēs)der.
Ancient Greek -ῑ́της (-ī́tēs)der.
Latin -ītēsbor.
French -iteder.
English -ite
English fluorite
Middle Low German sparder.
Old English spærstān
Middle English sparston
English sparstonebf.
English spar
blend
English fluorspar
Proto-Indo-European *-éh₁ti
Proto-Indo-European *-sḱéti
Proto-Indo-European *-éh₁sḱeti
Proto-Italic *-ēskō
Latin -ēscō
Latin -escensder.
English -escence
English fluorescencebf.
English fluoresce
Proto-Indo-European *-yósder.
Proto-Italic *-āzijos
Latin -āriusnom.
Latin -āriusbor.
Proto-Germanic *-ārijaz
Proto-West Germanic *-ārī
Old English -ere
Middle English -ere
English -er
English fluorescer
From fluoresce + -er.