assumed
v.v. to believe something is true without having proof. You often use this when you make a guess based on what seems likely.
v. to take for granted or accept as true without proof. Often used to describe the formation of a hypothesis or a subjective belief in the absence of empirical evidence.
I assumed you were coming to the party.
Since the lights were off, I assumed nobody was home and left a note on the door.
The researchers assumed that the participants would respond honestly, though they acknowledged that social desirability bias could potentially skew the final data set.
The verb is transitive and often takes a 'that' clause as its object.
I assumed about his arrivalI assumed his arrivalAssume is a transitive verb and does not require a preposition like 'about' before its object.