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English definition of “opaque”

opaque

adjective     /əʊˈpeɪk/ US  /oʊ-/
preventing light from travelling through, and therefore not transparent or translucent: opaque glass/tightsOpaque formal describes writing or speech that is difficult to understand: I find her poetry rather opaque.Difficult to understandComplicated and difficult to doPuzzle and confuse opaquely     /-li/ adverb Transparent
(Definition of opaque adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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