duo-, du-

(Latin: two, double; a word element for the number "2")

dualist
dualistic
duality
dualize
dualpurpose
duarchy
dubious (DOO bee uhs, DYOO bee uhs) (adjective), more dubious, most dubious
1. Pertaining to uncertainty or causing doubt; unconvincing: The person applying for the job at the employment office presented dubious qualifications.
2. Of questionable character; open to suspicion: The owner of the construction company had dubious feelings when Gerry claimed to have landed the biggest contract in the history of the business.
3. Etymology: from Latin dubiosus, "doubtful", from dubium, "doubt", neuter of dubius, "doubtful"; from duo, "two"; in the sense, "of two minds, undecided between two things". Old English also used tweo, "two"; to mean "doubt".
Arousing doubt as to what is really going on.
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Of questionable character or value.
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dubiously
dubiousness
duel
duelist
duet
dulogue
duo
duodecennial