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

慰問[imon] condolences
一問一答[ichimonittou] answering question by question
演習問題[enshuumondai] practice problem
応用問題[ouyoumondai] application problem
押し問答[oshimondou] dispute

卸問屋[oroshidonya] wholesaler
下問[kamon] enquiry
外交問題[gaikoumondai] diplomatic issue
学問[gakumon] scholarship
学問的[gakumonteki] scholarly