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

悉く[kotogotoku] altogether
不悉[fushitsu] Very Sincerely Yours
悉に[tsubusani] in detail
悉皆[shikkai] all
知悉[chishitsu] complete knowledge

悉曇[shittan] Siddham character (used for writing Sanskrit)
悉曇学[shittangaku] Siddham studies
悉無律[shitsumuritsu] all-or-none law
蘇悉地経[soshitsujikyou] Susiddhikara Sutra