This is the 1969th most frequent German word.
fliegen
"Fliegen" means "to fly."
In this context, 'fliegen' refers to the action of birds in flight.
Die Vögel fliegen hoch am Himmel.
The birds are flying high in the sky.
Here, 'fliegen' is used to describe the action of traveling by air.
Ich fliege morgen nach Berlin.
I am flying to Berlin tomorrow.
This sentence employs 'fliegen' to describe the propulsion motion of an aircraft.