deb ther

anal, chronicle, records, documents, records, catalogues, registers, lists, books [RY]

annals, chronicle, records, documents, records, catalogues, registers, lists, books [IW]

register, documents, catalogues, anything recorded in writing or stitched together [JV]

historical book, annals [RY]

Borrowed from Persian دفتر‎ (daftar), ultimately from Ancient Greek διφθέρᾱ (diphthérā, “parchment”). The spelling with གཏེར (deb gter) is based on a folk etymology connecting it to the meaning "treasure". Thus it appears that this is the origin of deb, the main Tibetan word for "book". [Erick Tsiknopoulos]