This is the 4255th most frequent German word.
doppelten
"Doppelten" means "double" or "duplicated" in English.
Here, 'doppelten' is used as an adjective modifying 'Espresso,' indicating its quantity (double).
Ich habe einen doppelten Espresso bestellt.
I ordered a double espresso.
In this context, 'doppelten' describes 'Regenbogen,' signifying a natural phenomenon consisting of two rainbows.
Nach dem doppelten Regenbogen folgte Sonnenschein.
After the double rainbow, sunshine followed.
Here 'doppelten' is used in relation to 'Einsatz,' defining the intensity or degree (double effort).