'unintentionally-worn' originates from the combination of 'unintentionally' and 'worn', where 'unintentionally' means 'not done on purpose' and 'worn' is the past participle of 'wear', meaning 'to have on one's body'.

'Unintentionally' comes from the Latin 'intentio', meaning 'stretching out', combined with the prefix 'un-' to denote negation. 'Worn' is derived from the Old English 'werian', meaning 'to clothe'.

Initially, 'worn' meant 'to have on one's body', and 'unintentionally' meant 'not done on purpose'. Together, they describe something used without intent.