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

偉丈夫[ijoufu] great man
一妻多夫[issaitafu] polyandry
一夫一婦[ippuippu] monogamy
一夫多妻[ipputasai] polygamy
駅夫[ekifu] railway employee (porter)

鰥夫[yamoo] widower
火夫[kafu] fireman
姦夫[kanpu] adulterer
旧夫[kyuufu] former husband
漁夫[gyofu] fisherman