enfoncer des portes ouvertes

• enfoncer une porte ouverte

Literally, “to push in open doors”. Compare Italian sfondare una porta aperta, German offene Türen einrennen, Russian ломи́ться в откры́тую дверь (lomítʹsja v otkrýtuju dverʹ), and the same in most other European languages.

• IPA^(key): /ɑ̃.fɔ̃.se de pɔʁ.t‿u.vɛʁt/

• France (Vosges)

  (file)

enfoncer des portes ouvertes

1. (figuratively) to state the obvious as though it were new or controversial; to try to force or persuade someone who is already convinced; ≈ to preach to the choir

• enfonceur de portes ouvertes
• enfonceuse de portes ouvertes

• lapalissade
• truisme
• prêcher un convaincu