keyaki
/kiːˈ(j)ɑːki/ /keɪːˈ(j)ɑːki/(also kiaki, kiyaki)
noun
A deciduous tree, Zelkova serrata (family Ulmaceae), native to Japan and other parts of eastern Asia, commonly planted as a shade tree and formerly for timber.
Origin
Mid 19th century. From Japanese keyaki, (regional) kiyaki, kiyake from a first element of uncertain origin, perhaps keya conspicuous, different (on account of the unusual grain of its wood; from ke other, strange) + -ki tree.