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

四隅[yosumi] four corners
南隅[nanguu] southern corner
僻隅[hekiguu] corner
片隅[katasumi] corner
一隅[ichiguu] corner

隅々[sumizumi] nooks
隅に置けない[suminiokenai] witty and knowing
隅から隅まで[sumikarasumimade] every nook and corner
隅木[sumiki] angle (corner) block