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

圧着端子[acchakutanshi] crimp contact
異端[itan] heresy
異端者[itansha] heretic
井戸端[idobata] side of well
井戸端会議[idobatakaigi] content-free chat

一端[ittan] one end
一端[ippashi] competent enough
下っ端[shitappa] underling
下端[katan] lower end
管端[kantan] end of wind instrument