There are multiple definitions - click on the translation that matches your context.

legge ned påstand om

uttrykk

partial

assert

verb

Definitions of assert

to do something that shows that you have power

Senior figures in the party have urged Dr Garner to assert his authority ahead of Sunday's elections.

to present and demand recognition of (a legal right)

The McNeils asserted a claim against the manufacturer when, as a result of a design fault, their car burst into flames.

to state something confidently

He went on to assert that overdraft terms could still be assessed for their fairness for reasons other than price. For instance, if customers were taken by surprise.