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

口辺単純疱疹[kouhentanjunhoushin] cold sore
純愛[junai] pure love
純益[juneki] clear profit
純化[junka] purification
純金[junkin] pure gold

純潔[junketsu] purity
純血[junketsu] pure-bred (usu. animal)
純情[junjou] pure heart
純真[junshin] purity
純粋[junsui] pure