御中[onaka] stomach
御話中[ohanashichuu] busy (phone)
アル中[aruchuu] alcoholism
π中間子[paichuukanshi] pi meson
暗中[anchuu] in the dark

暗中摸索[anchuumosaku] groping in the dark
意中[ichuu] one's mind
意中の女[ichuunoonna] sweetheart
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一日中[ichinichijuu] all day long

一興[ikkyou] amusement
感興[kankyou] interest
興がる[kyougaru] to be amused or interested in
興じる[kyoujiru] to amuse oneself
興す[okosu] to revive

興ずる[kyouzuru] to amuse oneself
興る[okoru] to rise
興亜[koua] Asia development
興起[kouki] rise
興業[kougyou] industrial enterprise