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

急度[kitto] surely
オリエント急行[orientokyuukou] Orient express
応急[oukyuu] emergency
応急攻撃[oukyuukougeki] hasty attack
応急渡河[oukyuutoka] hasty crossing

火急[kakyuu] emergency
緩急[kankyuu] pace
危急[kikyuu] emergency
危急存亡[kikyuusonbou] life-and-death matter

一旦[ittan] once
元旦[gantan] New Year's Day
旦那[danna] master (of a house, shop, etc.)
巴旦杏[hatankyou] plum
文旦[buntan] shaddock

旦つく[dantsuku] husband
命旦夕に迫る[meitansekinisemaru] to be on the brink of death
旦夕[tanseki] on the brink of
若旦那[wakadanna] young master
大旦那[oodanna] master

緩々[yuruyuru] very loose
緩い[nukui] lukewarm
緩い[yurui] loose
緩み[yurumi] slack
緩む[yurumu] to become loose

緩める[yurumeru] to loosen
緩やか[yuruyaka] loose
緩下薬[kangeyaku] laxative
緩急[kankyuu] pace
緩行[kankou] going slowly