This is the 6878th most frequent German word.
feinden
"Feinden" means "to treat as an enemy" or "to act hostile toward."
"Feinden" is used as a verb meaning to treat as an enemy or oppose.
Er begann, die alte Partei zu feinden.
He began to oppose the old party.
"Feinden" is used reciprocally to indicate mutual enmity or opposition.
Die Nachbarn feinden sich gegenseitig seit Jahren.
The neighbors have been opposing each other for years.
Here, "feinden" describes ideological opposition among groups.