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

燐寸[macchi] match (contest)
一寸[issun] one sun (approx. 3.03 cm)
一寸[chotto] just a minute
一寸先[issunsaki] an inch ahead
一寸逃れ[issunnogare] quibbling

一寸法師[issunboushi] dwarf
胸三寸[munesanzun] heart
九寸五分[kusungobu] dagger
原寸[gensun] actual size
原寸大[gensundai] actual size