How to Say "guess" in Spanish
The Spanish word for “guess” is “suposición” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
nounB1
an informal estimation

Examples
Es solo una suposición, no tengo pruebas todavía.
It is just an assumption; I don't have proof yet.
Tu suposición sobre el clima fue correcta.
Your guess about the weather was correct.
Partimos de la suposición de que todos están de acuerdo.
We are starting from the assumption that everyone agrees.
Identifying Gender
Words that end in '-ción' are almost always feminine. You should always use 'la' or 'una' with this word (la suposición).
Assumption vs. Supposedly
Mistake: “Using 'suposición' to mean 'supposedly'.”
Correction: Use 'supuestamente' for 'supposedly'. Use 'suposición' only when you are talking about the noun (the idea itself).
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