馬の背 うまのせ Meanings Expression, Noun horse's back (mountain) ridge; arête; road along a ridge Kanji 馬 horse. Read as うま. 背 back. Read as せ. Words containing 馬の背 馬の背を分ける (うまのせをわける) to rain on one side only (and leave the other side dry) Jinuma: Japanese Dictionary · Word lists