- Word Explorer, Word Parts
|part of speech:
||having or causing doubt.
He was doubtful that he would finish the race.The evidence is doubtful.
- skeptical, suspicious, uncertain, undecided
- certain, clear, positive, sure
||not likely; not probable.
It is doubtful that we will have rain today.
||of uncertain result.
The night before the presidential election, some states were still doubtful.
- indefinite, uncertain
||fishy, hesitant, incredible, indefinite, insecure, suspicious, uncertain
||doubtfully (adv.), doubtfulness (n.)