guess
n. countablen. an answer or opinion you give when you do not have all the facts. You are trying to be right, but you are not 100% sure.
n. an estimate or conclusion formed without sufficient evidence or certainty. Often used with the verb 'make' or 'take'.
My guess is that the train will be late.
If you do not know the answer to the question, just take a wild guess.
Even an educated guess requires a baseline of data, as making a claim without any foundational knowledge is merely speculation rather than informed estimation.
From Middle English gessen (verb) and Middle English gesse (noun), probably of North Germanic origin, from Old Danish getse, gitse, getsa (“to guess”), from Old Norse getsa, gitsa, from Proto-Germanic gitisōną (“to guess”), from Proto-Germanic getaną (“to get”), from Proto-Indo-European *gʰed- (“to take, seize”). Cognate with Danish gisne (“to guess”), Norwegian gissa, gjette (“to guess”), Swedish gissa (“to guess”), Saterland Frisian gisje (“to guess”), Dutch gissen (“to guess”), Low German gissen (“to guess”), Dutch gis (“a guess”). Related also to Icelandic giska ("to guess"; from Proto-Germanic *gitiskōną). Compare also Russian гада́ть (gadátʹ, “to conjecture, guess, divine”), Albanian gjëzë (“riddle”) from gjej (“find, recover, obtain”). More at get.
Commonly follows the verbs 'make', 'take', or 'give'. Often paired with the adjectives 'wild', 'lucky', or 'educated'.
I made a guess about of the priceI made a guess at the priceWhen 'guess' is a noun, it typically takes the preposition 'at' or 'about', but not 'about of'.