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

一劃[ikkaku] one plot (of land)
劃する[kakusuru] to draw (a line)
劃期[kakki] ground-breaking
劃策[kakusaku] plan
劃数[kakusuu] stroke count

劃然[kakuzen] distinct
劃時代的[kakujidaiteki] epoch-making
企劃[kikaku] planning
劃一[kakuitsu] uniformity