sumption
noun
sump·tion
ˈsəm(p)chən
plural -s
1
: assumption sense 7
2
: major premise
Word History
Etymology
Middle English sumpcion, from Medieval Latin sumpsion-, sumpsio, alteration of Latin sumption-, sumptio action of taking, from sumptus (past participle of sumere to take) + -ion-, -io -ion