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

一緒[issho] together
一緒くた[isshokuta] medley
一緒に[isshoni] together (with)
一緒にする[isshonisuru] to unite

下げ緒[sageo] cord for attaching a sword scabbard tightly to the obi
堪忍袋の緒が切れる[kanninbukuronoogakireru] to be out of patience
緒作[shosaku] various works
緒戦[shosen] beginning of hostilities