certainly
uk
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/ˈsɜː.tən.li/us
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/ˈsɝː.tən.li/ A2 adverb used to reply completely or to emphasize something and show that there is no doubt about it: She certainly had a friend called Mark, but I don't know whether he was her boyfriend. 她确实有个朋友叫马克，不过我不知道他是不是她男友。