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

関脇[sekiwake] wrestler of the third highest rank
口脇[kuchiwaki] edges of the mouth
小脇[kowaki] under one's arm
脇見[wakimi] looking from the side
両脇[ryouwaki] both sides

脇差し[wakizashi] short sword
脇腹[wakibara] side
脇役[wakiyaku] supporting role (actor)
脇毛[wakige] underarm hair