doubt·less /ˈdaʊtləs/
(a.)無疑的,確定的(ad.)無疑地,確定地
Doubt·less, a. Free from fear or suspicion. [Obs.]
Pretty child, sleep doubtless and secure. --Shak.
Doubt·less, adv. Undoubtedly; without doubt.
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doubtless
adv : with certainty; "it's undoubtedly very beautiful" [syn: undoubtedly,
beyond question, without doubt, beyond any doubt]