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

一刻[ikkoku] minute
一刻も早く[ikkokumohayaku] immediately
一刻千金[ikkokusenkin] every moment is precious
印刻[inkoku] seal engraving

印刻師[inkokushi] seal engraver
夏時刻[natsujikoku] daylight-saving time
午刻[gokoku] noon
行動発起時刻[koudouhakkijikoku] h-hour

お早うございます[ohayougozaimasu] good morning
一刻も早く[ikkokumohayaku] immediately
いち早く[ichihayaku] promptly
口早[kuchibaya] rapid talking
最早[mohaya] already

時期が早い[jikigahayai] before scheduled
時期尚早[jikishousou] premature
時機尚早[jikishousou] before its time
早手[hayate] gale
手早い[tebayai] nimble