Origin: L < Gr Phlegethōn, orig. prp. of phlegethein, to blaze: for IE base see flagrant
See Phlegethon in American Heritage Dictionary 4
Origin: Middle English Flegeton
Origin: , from Latin Phlegethōn
Origin: , from Greek
Origin: , from
Origin: present participle of phlegethein, to blaze
Origin: , variant of phlegein; see bhel-1 in Indo-European roots.