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seriously

adverb (NOT JOKING)
 
 
/ˈsɪə.ri.əs.li/ US  /ˈsɪr.i-/

Definition

B2 in a serious way, not joking: Seriously now, did he really say that or are you just being silly? You're not seriously thinking of leaving, are you?Lacking humour
(Definition of seriously adverb (NOT JOKING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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