'apotheose' originates from French, specifically the word 'apothéose', where the Greek-derived elements 'apo-' meant 'away/from' and 'theos' meant 'god'.

'apotheose' entered English via French 'apothéose' (and is related to the English noun 'apotheosis'); the term ultimately goes back to Greek 'ἀποθέωσις' ('apotheōsis') and was adapted into Late Latin and then French before appearing in English (with 'apotheose' surviving as a less common/archaic form).

Initially, it meant 'the act of becoming a god or deification'; over time its sense broadened to include 'climax' or 'culmination' in general usage.