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

暗い[kurai] dark
暗がり[kuragari] darkness
暗に[anni] implicitly
暗やみ[kurayami] darkness
暗うつ[anutsu] gloom

暗雲[anun] dark clouds
暗褐色[ankasshoku] dark brown
暗きょ[ankyo] subterranean drain
暗君[ankun] foolish ruler
暗号[angou] code