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

零し話[koboshibanashi] complaining
取零す[torikobosu] to lose an easy game
爪で拾って箕で零す[tsumedehirottemidekobosu] penny wise and pound foolish
零落れる[ochibureru] to be ruined
零す[kobosu] to spill

零れる[koboreru] to spill
零下[reika] below zero
零行列[reigyouretsu] zero matrix
零細[reisai] insignificant