'avidly' originates from English, specifically the adjective 'avid', where 'avid' ultimately comes from Latin 'avidus', in which 'avidus' meant 'eager, greedy'.

'avid' entered English from Latin 'avidus' (via Middle English), and the adverb 'avidly' was formed in modern English by adding the suffix '-ly' to the adjective 'avid'.

Initially the root meant 'eager' or 'greedy' in Latin; over time the English derivatives came to mean 'showing keen interest or enthusiasm', and 'avidly' now generally means 'with eager interest' (though it can still carry a sense of voraciousness).