The definition of believe means to have confidence in the truth of something.
To make a supposition; suppose or believe:
Speculate is to buy or sell land or other investments that are high risk, with the goal to make a very big profit.
Put (something somewhere) firmly.
To rely too much (on or upon), as in taking liberties
To imagine; conjecture.
To expect or intend (to do something):
Infer is defined as to conclude from evidence or assumptions.
To send before the time, or beforehand; hence, to cause to be before something else; to employ previously.
To take for granted without proof
To make a judgment about (something) without sufficient evidence; guess:
Find another word for presuppose. In this page you can discover 21 synonyms, antonyms, idiomatic expressions, and related words for presuppose, like: believe, assume, speculate, posit, presume, suppose, reckon, postulate, take-for-granted, infer and premise.