mid-14c., deifien, "to make god-like;" late 14c., "make a god of, exalt to the rank of a deity," from Old French deifier (13c.), from Late Latin deificare, from deificus "making godlike," from Latin deus "god" (from PIE root *dyeu- "to shine," in derivatives "sky, heaven, god") + -ficare, combining form of facere "to make, do" (from PIE root *dhe- "to set, put"). Sense of "adore, regard as an object worthy of worship" is from 1580s. Related: Deified; deifying.
"act of making into a god; state of being raised to the rank of a deity," late 14c., from Late Latin deificationem (nominative deificatio), noun of action from past-participle stem of deificare (see deify).
Proto-Indo-European root meaning "to shine," in derivatives "sky, heaven, god."
It forms all or part of: adieu; adios; adjourn; Asmodeus; circadian; deific; deify; deism; deity; deodand; deus ex machina; deva; dial; diary; Diana; Dianthus; diet (n.2) "assembly;" Dioscuri; Dis; dismal; diurnal; diva; Dives; divine; joss; journal; journalist; journey; Jove; jovial; Julia; Julius; July; Jupiter; meridian; Midi; per diem; psychedelic; quotidian; sojourn; Tuesday; Zeus.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit deva "god" (literally "shining one"); diva "by day;" Avestan dava- "spirit, demon;" Greek delos "clear;" Latin dies "day," deus "god;" Welsh diw, Breton deiz "day;" Armenian tiw "day;" Lithuanian dievas "god," diena "day;" Old Church Slavonic dini, Polish dzień, Russian den "day;" Old Norse tivar "gods;" Old English Tig, genitive Tiwes, name of a god.