doubtless
adverb
formaluk/ˈdaʊt.ləs/us/ˈdaʊt.ləs/used tomeanthat you arecertainthat something willhappenor istrue:
毫无疑问,毋庸置疑,肯定They will doubtlessprotest, but there's nothing they can do.他们肯定会提出抗议,但却也无能为力。
Doubtless you haveheardthenewsalready.你肯定已经得知这个消息。
Certainty
- (as) clear as dayidiom
 - (as) sure as eggs is eggsidiom
 - and that's flat!idiom
 - assured
 - assuredly
 - decidedly
 - deffo
 - definite
 - definitely
 - definitive
 - nailsomethingon
 - nailed on
 - natch
 - not miss a beatidiom
 - not miss/skip a beatidiom
 - solidity
 - squarely
 - watertight
 - would
 - you can bet your lifeidiom