京けい急きゅう本ほん線せんMeaningsNoun1. Keikyū Main LineKanji used京capital急hurry本book線lineComposed of京けい10^16; 10,000,000,000,000,000; ten quadrillionNumeric急きゅうsudden; abrupt; unexpected; urgent; pressing; steep; sharp; precipitous; rapid; swift; …Na-adjective本ほん線せんmain line; trunk lineNoun