English
suppositional
From supposition + -al.
Formed from supposition + -al
Proto-Indo-European *tḱey- ‘to build, cultivate’
…
Latin positiōnem ‘position’
Latin suppositiō
Anglo-Norman supposicion
Middle English supposicioun ‘a proposition or assertion’
English supposition
Today it means
adj Relating to, or based on, supposition; hypothetical; conjectural.
Language periods are conventional ranges, not dates for this word.
Etymograph / suppositional