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sky-high

adjective, adverb
 
 
/ˌskaɪˈhaɪ/

Definition

describes a price or charge that is very high: The price of oil went sky-high when war broke out.Costing too muchExpensive and luxurious
(Definition of sky-high adjectiveadverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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