supor

This phrase means 'to be sure' or 'to be certain'. It's the opposite of 'supor', as it implies knowledge or strong conviction rather than an unproven assumption.

The verb 'saber' means 'to know'. If you 'sabe' something, you have knowledge of it, which contrasts with 'supor' where you are making an assumption without definitive proof.

'Acreditar' means 'to believe'. While 'supor' can be a type of belief, 'acreditar' often implies faith or conviction, not necessarily a lack of proof as in 'supor'.

'Achar' can mean 'to find' or 'to think/believe'. When used to express an opinion, it's often confused with 'supor'.

While 'supor' is about assuming something without proof, 'achar' often implies a personal opinion or a belief based on some observation, even if informal.

Eu acho que vai chover mais tarde. (I think it's going to rain later. - expressing an opinion)

'Imaginar' means 'to imagine', which can involve forming a mental picture or conceiving a possibility, sometimes without concrete evidence, similar to 'supor'.

The key difference is that 'imaginar' focuses on the mental creation of an idea or scenario, while 'supor' is about accepting something as likely true. 'Imaginar' often has a stronger connotation of creation within one's mind.

Eu imagino que ele esteja ocupado. (I imagine he's busy. - conceiving a possibility)

'Concluir' means 'to conclude', which involves reaching a decision or opinion after considering facts. This can be seen as similar to forming an assumption.

Unlike 'supor', which is about making an assumption without proof, 'concluir' implies a process of reasoning and evaluation of available information to arrive at a judgment.

Eu concluí que o projeto seria adiado. (I concluded that the project would be postponed. - based on information)

'Deduzir' means 'to deduce', which is to arrive at a conclusion by reasoning. This can sometimes feel like 'supor' as both involve forming an idea about something not explicitly stated.

The core distinction is that 'deduzir' relies on logical inference from known facts, whereas 'supor' is more of a guess or an unproven belief.

Eu deduzi que eles eram irmãos pelo jeito que se pareciam. (I deduced that they were siblings by how they looked. - based on observation and reasoning)

'Pressupor' is very close in meaning to 'supor', both meaning 'to presuppose' or 'to assume'. They are almost synonyms and can often be used interchangeably.

While very similar, 'pressupor' can sometimes carry a slightly stronger implication of taking something for granted or a pre-existing condition, whereas 'supor' can be a more spontaneous assumption. In many contexts, the difference is negligible.

Eu pressuponho que você já saiba disso. (I presuppose/assume you already know this. - taking it for granted)