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

に因って[niyotte] according to
に因る[niyoru] by means of
に因れば[niyoreba] according to (quotation)
悪因悪果[akuinakka] sowing and reaping evil
悪因縁[akuinnen] evil destiny

遺伝因子組替え[ideninshikumikae] recombinant gene splicing
一因[ichiin] cause
因みに[chinamini] by the way
因る[yoru] to be due to