Sanskrit-Japanese dictionary
A reference work that provides Japanese translations or explanations of Sanskrit words. The term is straightforward and used in academic or Buddhist studies contexts.
He is reading Sanskrit scriptures while consulting a Sanskrit-Japanese dictionary.
梵語辞典 is a more general term for a Sanskrit dictionary, not necessarily specifying Japanese as the target language. 梵和辞典 explicitly indicates a Sanskrit-Japanese dictionary.
Compound of 梵 (bon, abbreviation of 梵語 'Sanskrit') + 和 (wa, 'Japanese') + 辞典 (jiten, 'dictionary'). The reading ぼんわじてん follows standard on'yomi.