Dev (Dēw / Div)

The term appears across Iranian-language records: Classical Persian dēw (دیـو / دیو) and Iranian Persian dīv are cognate with Avestan daeva (𐬛𐬀𐬉𐬎𐬎𐬀 daēuua). In Zoroastrian canonical context the daevas are characterized in the Gathas as 'gods that are (to be) rejected,' indicating a historical-theological reclassification in which certain beings named with the same linguistic root are treated as illegitimate or hostile divinities rather than proper objects of worship. In Persian popular lore the reflex div/dev is summarized in reference works as 'monstrous creatures' or broadly as demons/fiends, reflecting both a literary-theological polemic and a folkloric inventory of hostile supernatural actors (Sources: encyclopedia summary of Div (mythology); encyclopedia entry for Daeva).

Source material does not provide consistent, detailed physical descriptions. Reference summaries describe Persian div/dev simply as 'monstrous creatures' (i.e., non-human and fearsome) and the Avestan cognate as a class of disagreeable supernatural beings; beyond this general characterization the supplied texts give no reliable recurring bodily features, size, coloration, or typical disguises (Sources: Div (mythology); Daeva).

The sources frame the entities primarily in moral and religious terms rather than by enumerated magical powers. The Avestan daeva are described as supernatural beings 'with disagreeable characteristics' and as 'gods that are (to be) rejected' in the Gathas, implying antagonism toward the religious order and a hostile role. Persian-language summaries render div/dev as 'demons or fiends' and 'monstrous creatures,' which in general suggests harmful or dangerous behavior in mythic contexts; however, the supplied excerpts do not specify particular abilities (possession, shape-changing, disease-causing, etc.), so such functional details are undocumented in these sources (Sources: Div (mythology); Daeva).