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

一徹[ittetsu] obstinate
一徹者[ittetsumono] stubborn person
貫徹[kantetsu] accomplishment
周知徹底[shuuchitettei] (something) known to all
初志貫徹[shoshikantetsu] carrying out one's original intention

徹す[toosu] to stick through
徹る[tooru] to go by
徹甲弾[tekkoudan] armor piercing ammunition
徹宵[tesshou] all night
徹底[tettei] thoroughness