apporter de l'eau au moulin de

== French == === Etymology === Literally, “to bring water to someone's mill”. === Pronunciation === IPA(key): /a.pɔʁ.te d(ə) l‿o o mu.lɛ̃ də/ === Verb === apporter de l'eau au moulin de (figuratively) to add grist for the mill, to bring grist for the mill, to provide ammunition for someone (to provide extra arguments in support of someone's stance) Synonym: donner du grain à moudre à