doubtable

Capable of being doubted; doubtful; dubious; dubitable. See usage notes below.

Adjective

  1. Capable of being doubted; doubtful; dubious; dubitable. See usage notes below.
    • Descartes adopts the tool of a radical skepticism, submitting to question established beliefs, exposing them to the test of doubt, breaking them down when they prove doubtable. - 1971, L. J. Swingle, “On Reading...
  2. Fearsome; redoubtable.

Origin

From Middle English doutable, from Old French doutable, dotable, equivalent to doubt + -able.

Forms

more doubtable most doubtable

Synonyms

uncertain

Derived

doubtability undoubtable