This is the 13529th most frequent German word.
bräunen
To brown or to tan.
Here, 'bräunen' is used to describe browning or roasting the bread to make it toasted.
Ich bräune das Brot im Toaster.
I toast the bread in the toaster.
In this sentence, 'bräunen' refers to tanning the skin in the sun.
Er bräunt seine Haut am Strand.
He tans his skin at the beach.
Here, 'bräunen' indicates giving the onions a golden color through cooking.