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

飲干す[nomihosu] to drink up
刈り干す[karihosu] to cut and dry (in the sun)
干菓子[higashi] dried candies
乾干し[karaboshi] sun-dried fish or vegetables
干物[hoshimono] things dried in the sun (esp. clothes, dyed cloth, etc.)

干し固める[hoshikatameru] to dry until stiff
干草[hoshigusa] hay
干る[hiru] to dry
干害[kangai] drought disaster