佚書[issho] lost book
佚する[issuru] to lose (a chance)
佚楽[itsuraku] pleasure
安佚[anitsu] (idle) ease

放佚[houitsu] self-indulgence
散佚[sanitsu] being scattered and ultimately lost
淫佚[initsu] debauchery

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

逸る[haguru] to stray from
逸散に[issanni] at top speed
逸らす[sorasu] to turn away
逸れ矢[soreya] stray arrow
逸機[ikki] missing a chance

逸球[ikkyuu] muffed ball
逸材[itsuzai] outstanding talent
逸事[itsuji] anecdote
逸出[isshutsu] escape
逸速く[ichihayaku] promptly