offene Türen einrennen

== German == === Etymology === Literally, “to push in open doors”. Compare French enfoncer des portes ouvertes and the same in most other European languages. === Pronunciation === === Verb === offene Türen einrennen (irregular weak, third-person singular present rennt offene Türen ein, past tense rannte offene Türen ein, past participle offene Türen eingerannt, auxiliary sein) to try to persuade or force someone who is already convinced; to preach to the choir