Phlegethon[fleg′i t̸hän, flej′-]
Origin: L from Glassical Greek Phlegethōn, origin, originally present participle of phlegethein, to blaze: for Indo-European base see flagrant
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noun Greek Mythology
Origin: Middle English Flegeton, from Latin Phlegethōn, from Greek, from present participle of phlegethein, to blaze, variant of phlegein; see bhel-1 in Indo-European roots.