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

女臈[joro] prostitute (esp. Edo period)
上臈[jourou] court lady
臈闌ける[routakeru] to be elegant (usu. of a woman)

奥上臈[okujourou] woman in waiting in the inner part of a lord's mansion
中臈[chuurou] court ladies of the middle rank serving in the inner palace (Heian period)
臈乾[rakan] Chinese smoked and salted ham