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

ギックリ腰[gikkurigoshi] strained back
丸腰[marugoshi] unarmed
及び腰[oyobigoshi] bent back
けんか腰[kenkagoshi] belligerent
腰掛る[koshikakeru] to sit (down)

腰を下す[koshiwoorosu] to sit down
腰かけ[koshikake] seat
腰巻[koshimaki] loincloth
腰元[koshimoto] chamber maid