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Definition of crystal clear adjective from the Oxford Advanced Learner's Dictionary

crystal clear

adjective
 
/ˌkrɪstl ˈklɪə(r)/
 
/ˌkrɪstl ˈklɪr/
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  1. (of glass, water, etc.) completely clear and bright
  2. very easy to understand; completely obvious
    • I want to make my meaning crystal clear.
    • You’ve got to make your intentions crystal clear to them.
See crystal clear in the Oxford Advanced American Dictionary
croak
verb
 
 
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