ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

アルコール依存症[arukooruizonshou] alcohol dependency
愛憎併存[aizouheison] ambivalence
依存性[izonsei] dependence
依存度[izondo] degree of dependence
異存[izon] objection

異存がない[izonganai] nothing to say
一存[ichizon] one's own discretion (idea, responsibility)
温存[onzon] preserve
危急存亡[kikyuusonbou] life-and-death matter
既存[kison] existing