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refulgent (adj.)

c. 1500, from Middle French refulgent or directly from Latin refulgentem (nominative refulgens), present participle of refulgere "flash back, shine brilliantly," from re- "back" (see re-) + fulgere "to shine" (from PIE *bhleg- "to shine, flash," from root *bhel-(1) "to shine, flash, burn").