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

一幅[ippuku] (a) scroll
横幅[yokohaba] breadth
画幅[gafuku] picture scroll
格幅[kappuku] physique
肩幅[katahaba] shoulder width (breadth)

三幅対[sanpukutsui] set of three
紙幅[shifuku] space assigned for something (e.g. for article in magazine)
振り幅[furihaba] amplitude (of vibration)
振幅変調[shinpukuhenchou] amplitude modulation
戦闘正面幅[sentoushoumenhaba] frontage