This is the 4554th most frequent Spanish word.
aseveran
"They assert" or "They affirm."
Here, 'aseveran' is used to express that the experts are making a confident statement or assertion about the necessity of worldwide cooperation.
Los expertos aseveran que la solución al problema requerirá colaboración mundial.
Experts assert that the solution to the problem will require global collaboration.
In this case, 'aseveran' implies that they are declaring their intentions firmly, providing assurance about their sincerity.
Ellos aseveran que sus intenciones son honestas y no buscan ningún beneficio personal.
They claim that their intentions are honest and seek no personal gain.
Here, 'aseveran' conveys that the reports firmly state or indicate the regular occurrence of the phenomenon.