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

一所懸命[isshokenmei] very hard
一生懸命[isshoukenmei] very hard
引っ懸ける[hikkakeru] to hang (something) on (something)
懸り[kakari] starting
懸る[kakaru] to take (a resource, e.g. time or money)

懸ける[kakeru] to hang (e.g. picture)
気懸かり[kigakari] anxiety
懸案[kenan] pending question
懸崖[kengai] overhanging cliff