suppositious

 
Pronunciation: /ˌsʌpəˈzɪʃəs/

adjective

  • based on assumption rather than fact: most of the evidence is purely suppositious

Derivatives

suppositiously

adverb

suppositiousness

noun

Origin:

early 17th century (in the sense 'supposititious'): partly a contraction of supposititious, reinforced by supposition