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

扠置く[sateoku] to set aside
に置いて[nioite] in
にして置く[nishiteoku] to leave as
安置[anchi] enshrinement
位置合わせ[ichiawase] alignment

位置揃え[ichisoroe] justification
位置づけ[ichitsuke] placement
一つ置き[hitotsuoki] alternate
一つ置きに[hitotsuokini] alternately
一日置き[ichinichioki] every other day