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

御三時[osanji] three-o'clock snack
三鞭酒[shanpen] champagne
球面三角法[kyuumensankakuhou] spherical trigonometry
胸三寸[munesanzun] heart
元三[ganzan] New Year's period (January 1st to 3rd)

五十三次[gojuusantsugi] the 53 Toukaidou stages
向こう三軒[mukousangen] one's next three neighbors
降三世明王[gouzanzemyouou] Trailokyavijaya Vidya-raja
再三[saisan] again and again
再三再四[saisansaishi] repeatedly

沃度丁幾[youdochinki] tincture of iodine
豊沃[houyoku] fertility
沃素[youso] iodine (I)
肥沃[hiyoku] fertility
沃土[yokudo] rich soil

沃地[yokuchi] fertile land
沃野[yokuya] fertile fields or plain
沃化[youka] iodization
沃野千里[yokuyasenri] vast expansion of fertile land
沃度[youdo] iodine

バイオ素子[baiososhi] bio-device
弗素[fusso] fluorine (F)
一酸化炭素[issankatanso] carbon monoxide
栄養素[eiyouso] nutrient
塩化水素[enkasuiso] hydrogen chloride

塩素[enso] chlorine (Cl)
塩素酸[ensosan] chloric acid
塩素酸塩[ensosanen] chlorate
音楽の素質[ongakunososhitsu] aptitude for music
音素[onso] phoneme