一元[ichigen] unitary
一元化[ichigenka] unification
一元的[ichigenteki] monistic
一元論[ichigenron] monism
一次元[ichijigen] one dimensional

一新紀元[isshinkigen] new era
隠元[ingen] beans
隠元豆[ingenmame] common bean (Phaseolus vulgaris)
家元[iemoto] head of a school (of music, dance)
火の元[hinomoto] origin of fire

開襟シャツ[kaikinshatsu] open-collared shirt
共襟[tomoeri] same-colored neckband (coloured)
胸襟[kyoukin] one's heart
襟巻[erimaki] muffler
襟巻き蜥蜴[erimakitokage] frilled lizard (Chlamydosaurus kingii)

襟元[erimoto] front of neck
襟首[erikubi] nape of neck
襟足[eriashi] nape of neck
襟髪[erigami] scruff of neck
半襟[haneri] quality collar for an under kimono