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

賽の河原[sainokawara] The Children's Limbo
賽銭[saisen] monetary offering
賽子[saikoro] dice
賽銭箱[saisenbako] offertory box

賽は投げられた[saihanagerareta] the die is cast
賽六[sairoku] kid
賽の目[sainome] pip (spot on a die)