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

沃度丁幾[youdochinki] tincture of iodine
豊沃[houyoku] fertility
沃素[youso] iodine (I)
肥沃[hiyoku] fertility
沃土[yokudo] rich soil

沃地[yokuchi] fertile land
沃野[yokuya] fertile fields or plain
沃化[youka] iodization
沃野千里[yokuyasenri] vast expansion of fertile land
沃度[youdo] iodine