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

サンプリング周波数[sanpuringushuuhasuu] sampling frequency
波蘭[poorando] Poland
マイクロ波[maikuroha] microwave
ミリ波[miriha] milli-wave
圧力波[atsuryokuha] pressure wave

伊呂波[iroha] traditional ordering of the Japanese syllabary
浦波[uranami] (seaside) breakers
横波[yokonami] side (transverse) wave
音波[onpa] sound wave
寒波[kanpa] cold wave

イ長調[ichouchou] A major
データビット長[deetabittochou] data bit length
ト長調[tochouchou] G major
ニ長調[nichouchou] D major
ハ長調[hachouchou] C major

ヘ長調[hechouchou] F major
ホ長調[hochouchou] E major
ロ長調[rochouchou] B major
委員長[iinchou] committee chairman
意味深長[imishinchou] with profound (often hidden) meaning