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

為続ける[shitsuzukeru] to continue to do
遺産相続[isansouzoku] inheritance
永続[eizoku] permanence
永続性[eizokusei] persistent
家続き[ietsuzuki] row of houses

家督相続[katokusouzoku] inheritance
共同相続人[kyoudousouzokunin] joint heir
勤続[kinzoku] continuous service
勤続者[kinzokusha] man of long service
続ぐ[tsugu] to succeed (someone in a business or inheritance)