suppose
I suppose we'll have to leave soon if we want to catch the train.
The speaker assumes it is likely that they need to leave soon to catch the train.
To assume something is likely or true without proof
I suppose it will rain tomorrow since the forecast says so.
The speaker assumes rain is likely based on the weather forecast.
She supposed the meeting would be delayed, so she brought a book.
She made an assumption about the meeting's delay and prepared accordingly.
Often used to express uncertainty or politeness. Can imply a tentative belief.
To require or involve something as a necessary condition
The theorem supposes that all variables are positive integers.
The theorem requires that all variables be positive integers as a condition.
Common in mathematical or logical contexts to state a premise.
To be expected or required
The contract supposes the payment of a fee upon completion.
The contract stipulates that a fee must be paid upon completion.
Used to denote a legal or formal requirement.
Collocations
Related Phrases
Pro Tip
Polite Assumptions
Use 'suppose' to soften statements or questions, e.g., 'I suppose you're tired after the trip?' instead of 'You must be tired.'
Gold Rule
Avoid Overuse
While 'suppose' is versatile, overusing it can make speech sound hesitant. Use stronger verbs like 'believe' or 'think' when certainty is implied.
Word Origin
From Old French *supposer* (to assume), from Latin *supponere* (to place under, substitute), from *sub-* (under) + *ponere* (to put).
Usage Notes
Used to express a tentative belief or polite agreement. In questions, it often softens the tone ('Do you suppose we could leave early?').