guess or assume something without proof

surmise

verb|/sərˈmaɪz/

To suppose something is true without having evidence

Examples

In a meeting

I surmise that the delay is due to supply chain issues based on similar past situations.

Over coffee

I surmise they broke up from the way they've been avoiding each other.

Why this word

guess

surmise implies inference from incomplete evidence, while guess suggests random speculation

assume

surmise acknowledges uncertainty in the conclusion, while assume treats it as given

think

surmise specifically means forming an opinion on scant evidence, while think is vague about reasoning

Usage tip

Use when making educated guesses. More sophisticated than 'guess' and acknowledges uncertainty.

Etymology

Old French 'surmise' — 'sur' (upon) + 'mettre' (put), meaning accusation, later evolved to conjecture

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