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

一も二も無く[ichimonimonaku] unhesitatingly
一言二言[hitokotofutakoto] a word or two
一石二鳥[issekinichou] killing two birds with one stone
一二に及ばず[ichininioyobazu] right away
一姫二太郎[ichihimenitarou] It's good to have a girl first and then a boy

うり二つ[urifutatsu] as alike as two melons (two peas in a pod)
黄道十二宮[koudoujuunikyuu] twelve signs of the zodiac
二度[futatabi] again
最小二乗法[saishounijouhou] least-squares method
三十二分音符[sanjuunibuonpu] 32nd note

下婢[kahi] servant girl
侍婢[jihi] lady-in-waiting
僕婢[bokuhi] male and female servants
奴婢[dohi] servant
一盗二婢[ittounihi] The most thrilling types of sexual relationship for a man are, first, stealing someone's wife and, second, with a maidservant

私奴婢[shinuhi] privately-owned slave
官奴婢[kannuhi] government-owned slave
公奴婢[kunuhi] government-owned slave
老婢[rouhi] old housemaid

怪盗[kaitou] mysterious (phantom) thief
巨盗[kyotou] big-time robber
強盗[goutou] robber
強盗にはいる[goutounihairu] to commit a robbery
群盗[guntou] group (gang) of robbers

劫盗[goutou] highway robber
三重盗[sanjuutou] triple steal (baseball)
切り取り強盗[kiritorigoutou] violent robbery or burglary
窃盗[settou] theft
窃盗罪[settouzai] theft