conjecture

noun
1
an opinion or idea that is not based on definite knowledge and is formed by guessing
حدس, گمان
synonym guess
2
the act of forming an opinion or idea that is not based on definite knowledge
حدس, گمان
What was going through the killer's mind is a matter for conjecture.
see also guesswork
verb
1
to form an opinion about something even though you do not have much information on it
حدس زدن, گمان بردن, اظهار نظر براساس حدس, ظن‌بردن
synonym guess