Or nphil {nef-eel'}; from naphal; properly, a feller, i.e. A bully or tyrant -- giant.
see HEBREW naphal
H5303. Nephilim
נְפִלִים noun masculine plural giants, according to ᵐ5 γίγαντες so ᵑ9 ᵑ6; הַנְּפִלִים Genesis 6:4 (J), מִןהַֿנְּפִלִים עֲנָק בְּנֵי הַנְּפִילִים Numbers 13:33 (JE); ᵐ5 omit וגו ׳בְּנֵי, and so Di; these words perhaps doublet, but already in ⅏, also ᵑ9 (etymology dubious; compare Aramaic נְפִילָא נִיפְלָא, Orion; conjectures see in Thes Dion the passage; Tu Kn LenOr. i. 344, Eng. Tr. 345 f.; CheHebraica. iii (1887), 175, 176; all very precarious).