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

斎む[imu] to avoid
斎く[itsuku] to worship
斎み垣[imigaki] shrine fence
斎日[imibi] unlucky day (according to astrology)

斎戒[saikai] purification
斎戒もく浴[saikaimokuyoku] purification
斎垣[igaki] fence around a shrine
斎宮[saiguu] the ancient imperial princesses serving at the Ise shrine