■ verb
1》 suppose that something is the case on the basis of probability.
↘take for granted.
2》 be arrogant or impertinent enough to do something.
↘( ~ on/upon ) unjustifiably regard (something) as entitling one to privileges.
Derivatives
presumable adjective
Origin
ME: from OFr. ~r , from L. praesumere 'anticipate' (in late L. 'take for granted'), from prae 'before' + sumere 'take'.