This is the 1636th most frequent German word.
wusste
"Wusste" means "knew" (simple past of "wissen," to know).
Here, 'wusste' is used as the simple past tense of 'wissen' to express the knowledge of an event happening later in time.
Ich wusste, dass das Konzert heute Abend stattfindet.
I knew that the concert is happening tonight.
In this sentence, 'wusste' expresses past ignorance about a method or process.
Er wusste nicht, wie man das Problem löst.
He didn’t know how to solve the problem.
Here, 'wusste' is used in the plural form to indicate that the knowledge was shared and occurred in the past.