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

外堀[sotobori] outer moat (castle)
堀り抜く[horinuku] to dig through
根堀り葉堀り[nehorihahori] thoroughly
堀り鼠[horinezumi] pocket gopher
堀散らす[horichirasu] to dig up messily

堀川[horikawa] canal
内堀[uchibori] inner moat
釣堀[tsuribori] fish pond
堀り返す[horikaesu] to dig up