背戸の馬も相口 せどのうまもあいくち Also written 背戸の馬も合い口 Meanings Expression even an unruly horse can be tamed Kanji 背 back. Read as せ. 戸 door 馬 horse. Read as うま. 相 mutual. Read as あい. 口 mouth. Read as くち. Word lists Proverbs Jinuma: Japanese Dictionary · Word lists