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

女臈[joro] prostitute (esp. Edo period)
上臈[jourou] court lady
臈闌ける[routakeru] to be elegant (usu. of a woman)

奥上臈[okujourou] woman in waiting in the inner part of a lord's mansion
中臈[chuurou] court ladies of the middle rank serving in the inner palace (Heian period)
臈乾[rakan] Chinese smoked and salted ham