Passim is an adverb that means scattered throughout the text.
The Latin word passus (PAAH soos) means ‘scattered.’ When used in a modern context, our word of the day means ‘scattered at various places of the text. Here’s an example:
The book has many stories about my father’s experiences during the war passim. When you read those stories at various points, you get a sense of how brave a man he was.