'ardito' originates from Italian, specifically the past-participle/adjective from 'ardire' meaning 'to dare', ultimately from Latin roots related to 'ardēre' (to burn, be eager).

'ardēre' (Latin: 'to burn' or 'be eager') developed into Vulgar/Medieval forms influencing Old Italian 'ardire' ('to dare'), and Italian formed the adjective/noun 'ardito' (literally 'dared' / 'daring one').

Initially connected to the idea of 'burning' or strong internal eagerness (from Latin), the sense shifted to 'boldness' or 'readiness to dare', giving the modern meaning 'daring, bold' and the noun sense 'a daring person' (and historically the name of Italian shock troops).