This is the 4189th most frequent German word.
begehen
"Begehen" means "to commit" (e.g., a crime) or "to celebrate/observe" (e.g., an occasion).
The verb 'begehen' is used here to convey the act of committing or making (a mistake).
Er beging einen Fehler, den er später bereute.
He committed a mistake, which he later regretted.
Here, 'begehen' is used in the sense of actively observing or celebrating (an event).
Wir wollen das Jubiläum mit einer großen Feier begehen.
We want to celebrate the anniversary with a big party.
'Begehen' in this instance denotes the act of committing (a crime).