'adversaria' originates from Latin, specifically the word 'adversarius,' where 'adversus' meant 'turned towards' and '-arius' was a suffix indicating a collection or book.

'adversarius' transformed into the Latin word 'adversaria,' and eventually became the modern English word 'adversaria' through scholarly use.

Initially, it meant 'a collection of notes or commentaries,' and this meaning has largely remained the same in modern usage.