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all-out

adjective [before noun]
 
 
/ˌɔːlˈaʊt/ US  /ˌɑːl-/

Definition

complete and with as much effort as possible: We made an all-out effort to get the project finished on time.Trying and making an effortEffort and expending energy
(Definition of all-out adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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