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

愚昧[gumai] stupid
三昧[sanmai] samadhi (state of intense concentration achieved through meditation)
無知蒙昧[muchimoumai] unenlightened
あい昧[aimai] vague
曖昧さ[aimaisa] ambiguity

曖昧模糊[aimaimoko] obscure
曚昧[moumai] ignorance
読書三昧[dokushozanmai] being absorbed in reading
刃物三昧[hamonozanmai] (engaging in a) knife fight
贅沢三昧[zeitakuzanmai] indulging in every possible luxury

愛書[aisho] great love of books
愛読書[aidokusho] favourite book
悪書[akusho] harmful book
案内書[annaisho] guidebook
移動図書館[idoutoshokan] mobile library

遺言書[yuigonsho] testament
遺書[isho] note left by dead person
医書[isho] medical book
一つ書き[hitotsugaki] an item
一書[issho] one letter

愛読[aidoku] reading with pleasure
愛読者[aidokusha] subscriber
愛読書[aidokusho] favourite book
暗号解読[angoukaidoku] cryptanalysis
一読[ichidoku] perusal

閲読[etsudoku] reading
音読[ondoku] reading aloud
音読み[onyomi] on (Chinese) reading of kanji
下読[shitayomi] preparatory reading
可読[kadoku] readable