/ prɪˈzʌmptʃuəs; NAmE / adjective
[ not usually before noun ] too confident, in a way that shows a lack of respect for other people
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WORD ORIGIN
Middle English : from Old French presumptueux , from late Latin praesumptuosus , variant of praesumptiosus full of boldness, from praesumptio anticipation, from the verb praesumere anticipate (in late Latin take for granted), from prae before + sumere take.