Etymology

presumptive

pre·sumpt·ive
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Today it means: Based on presumption or conjecture; inferred, likely, presumed. Full definition →

Latin sūmptus ← Middle English presumptif ← Anglo-Norman presumptif
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The story

  1. Proto-Indo-European · derived from*h₁em-“to distribute; to take”
  2. Latin · derived frompraesūmptus“presumed”
  3. Late Latin · derived frompraesumptivus“based on presumption; bold; insolent”
  4. Middle French · derived frompresumptif
  5. Anglo-Norman · derived frompresumptif
  6. Middle English · inherited frompresumptif
  7. Latin · derived fromsūmptus
  8. English todaypresumptive

PIE word *upó From pre- + Latin sūmptus + -ive, from Late Middle English presumptif, presumptijf (“based on presumption”), from Anglo-Norman presumptif and Middle French presumptif, présomptif (“based on presumption; of an heir or heiress: presumed to be entitled to inherit unless someone with a superior entitlement is born; presumptuous”) (modern French présomptif), and directly from their etymon Late Latin praesumptivus (“based on presumption; bold; insolent”), from Latin praesūmptus (“presumed”) + -īvus (suffix forming adjectives). Praesūmptus is the perfect passive participle of praesūmō (“to presume”), from prae- (prefix meaning ‘before; in front’) + sūmō (“to seize, take; to accept, presuppose; to undertake”) (ultimately from Proto-Indo-European *h₁em- (“to distribute; to take”)).

Words from the same roots

Latinsūmptus all →

consumptionpresumptionresumptionconsumptivesubsumptionassumptivesubsumptive

Proto-Indo-European*h₁em- all →

consumesumptuary

Etymology from Wiktionary, CC BY-SA 4.0.