'filigree' originates from Italian, specifically the word 'filigrana,' where 'filo' meant 'thread' and 'grano' meant 'grain.'

'filigrana' transformed into the French word 'filigrane,' and eventually became the modern English word 'filigree' through Middle English.

Initially, it meant 'thread of grain,' but over time it evolved into its current meaning of 'delicate ornamental work.'