also: ぼんぼん
noun
Sanskrit-character book; book from India
Refers to a book written in Sanskrit script, typically a Buddhist scripture, or more broadly a book originating from India.
この梵本は古代インドの仏典です。
This Sanskrit-character book is an ancient Indian Buddhist scripture.
彼は梵本の研究に一生を捧げた。
He devoted his life to the study of Sanskrit-character books.
From 梵 (bon, 'Sanskrit; Brahman') + 本 (hon, 'book'), with rendaku voicing to ぼん. The reading ぼんぼん is a variant.