to suspect / assume
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to suspect / assume
To consider something likely or assume it without having definite proof.
Ich vermute, dass er den Zug verpasst hat, weil er immer zu spät kommt.
I suspect that he missed the train because he is always late.
'Vermuten' (to suspect / assume) is very often used with a subordinate clause introduced by 'dass' (that). In this subordinate clause, the conjugated verb comes at the end.
Der Arzt vermutet, dass der Patient eine Allergie hat.
The doctor suspects that the patient has an allergy.
'Vermuten' (to suspect / assume) is a neutral to slightly formal word. It expresses an assumption based on evidence or reasoning, but not yet certain knowledge.
Wir vermuten einen technischen Defekt als Ursache des Problems.
We suspect a technical defect as the cause of the problem.
When you suspect a person or thing to be in a particular place, the object is in the accusative, followed by the location.
Man vermutet die antike Stadt unter dem heutigen Rom.
The ancient city is suspected to be under present-day Rome.
to know
'wissen' and 'vermuten' both have to do with information in your mind. The important difference is certainty. You use 'wissen' when you are sure of a piece of information or know the evidence. You use 'vermuten' when you consider something likely but are not sure. Learners may confuse the words because both are often used with a dass-clause. A practical tip: if you are sure, you say 'ich weiß' (I know). If you only believe that something is true, you say 'ich vermute' (I suspect / assume).
Er vermutet, dass seine Schwester noch in der Küche ist.
He suspects that his sister is still in the kitchen.
Der Lehrer weiß, dass die Prüfung morgen stattfindet.
The teacher knows that the exam is taking place tomorrow.