crystal clear

Definitions of crystal clear
  1. adjective
    transmitting light; able to be seen through with clarity
    crystal clear skies”
    synonyms: crystalline, limpid, lucid, pellucid, transparent
    clear
    allowing light to pass through
  2. adjective
    (of language) transparently clear; easily understandable
    “a crystal clear explanation”
    synonyms: limpid, lucid, luculent, pellucid, perspicuous
    clear
    readily apparent to the mind
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