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English definition of “arch-”

arch-

prefix uk   /ɑːtʃ-/ us    /ɑːrtʃ-/

arch- prefix (MAIN)

most important: an archbishop an archdukeVery important or urgent

arch- prefix (EXTREME)

greater or especially worse than others of the same type: an arch-criminal his arch-enemy He's always been an arch-opponent of the project.Very and extremeComplete and wholeIntensifying expressions
(Definition of arch- prefix from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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