battre en brèche

== French == === Pronunciation === IPA(key): /ba.tʁ‿ɑ̃ bʁɛʃ/ === Verb === battre en brèche (idiomatic, of heavy artillery) to reduce to rubble, to give a pounding (idiomatic, figuratively) to tackle (an urgent issue), to strike at the heart of (a problem)