guess

1 to form an opinion from little or no evidence though she does not speak with an accent, I would still guess that she is a foreigner Synonyms assume, conjecture, daresay, imagine, presume, speculate, suppose, surmise, suspect, suspicion [chiefly dialect] Related Words conclude, deduce, gather, infer; hypothecate, hypothesize, theorize; believe, conceive, expect, judge, reckon [chiefly dialect], take, think Near Antonyms demonstrate, document, establish, prove, substantiate, validate; ascertain, determine, find out, learn

2 to decide the size, amount, number, or distance of (something) without actual measurement I would guess the road goes for about two miles before you have to take a left Synonyms calculate, call, conjecture, figure, gauge (also gage), estimate, judge, make, place, put, reckon, supposeRelated Words conclude, deduce, extrapolate, gather, infer, reason, understandNear Antonyms calibrate, measure, scale; compute, work out

3 to have as an opinion I never would have guessed that she was capable of such a terrible thing Synonyms allow [chiefly Southern & Midland], conceive, consider, deem, esteem, feel, figure, believe, hold, imagine, judge, reckon [chiefly dialect], suppose, thinkRelated Words regard, view; accept, perceive; depend, rely, trust; assume, presume, presuppose, surmise; conclude, deduce, inferNear Antonyms distrust, doubt, mistrust, question, suspect; disbelieve, discredit, reject