arch-

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1. a combining form that represents the outcome of archi- in words borrowed through Latin from Greek in the Old English period; it subsequently became a productive form added to nouns of any origin, which thus denote individuals or institutions directing or having authority over others of their class (archbishop; archdiocese; archpriest). More recently, arch-1 has developed the senses “principal” (archenemy; archrival) or “prototypical” and thus exemplary or extreme (archconservative); nouns so formed are almost always pejorative.

1. variant of archi- before a vowel: archangel; archenteron.

combining form

1. chief; principal; of highest rankarchangel; archbishop; archduke
2. eminent above all others of the same kind; extremearchenemy; archfiend; archfool

also archi-, word-forming element meaning “chief, principal; extreme, ultra; early, primitive,” from Latinized form of Greek arkh-, arkhi- “first, chief, primeval,” comb. form of arkhos “chief” (see archon).

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