Online Google Dictionary

doubtful 中文解釋 wordnet sense Collocation Usage Collins Definition
Adjective
/ˈdoutfəl/,
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Feeling uncertain about something,
  1. Feeling uncertain about something
    • - he looked doubtful, but gave a nod
    • - I was doubtful of my judgment
  2. Not known with certainty
    • - the fire was of doubtful origin
  3. Improbable
    • - it is doubtful whether these programs have any lasting effect
  4. Not established as genuine or acceptable
    • - of doubtful legality
  1. open to doubt or suspicion; "the candidate's doubtful past"; "he has a dubious record indeed"; "what one found uncertain the other found dubious or downright false"; "it was more than dubitable whether the friend was as influential as she thought"- Karen Horney
  2. fraught with uncertainty or doubt; "they were doubtful that the cord would hold"; "it was doubtful whether she would be admitted"; "dubious about agreeing to go"
  3. unsettled in mind or opinion; "drew a few tentative conclusions"
  4. (doubtfully) in a doubtful manner; "Gerald shook his head doubtfully"
  5. (doubtfulness) doubt: the state of being unsure of something
  6. Doubt, a status between belief and , involves uncertainty or distrust or lack of sureness of an alleged fact, an action, a motive, or a decision. ...
  7. Subject to, or causing doubt; Experiencing or showing doubt; Undecided or of uncertain outcome; Fearsome, dreadful; Improbable or unlikely; Suspicious, or of dubious character; Unclear or unreliable
  8. (DOUBTFULS) indigenous personnel who cannot be categorized as either Vietcong or civil offenders; suspect personnel spotted from ground or aircraft
  9. (doubtfuls) locals who, after being questioned, can not be classified as either Viet Cong, civil offenders, or friendlies.
  10. A loan that has all the weaknesses of a substandard loan plus it is difficult to collect in full.
  11. double quantum transition for finding unresolved lines