'unusual-fingered' is a compound word formed from 'unusual' and 'fingered'. 'Unusual' originates from the Latin word 'inusitatus', meaning 'not accustomed'. 'Fingered' comes from the Old English 'finger', meaning 'digit'.

'Unusual' evolved from the Middle English 'unusual', while 'fingered' remained largely unchanged from Old English.

Initially, 'unusual' meant 'not common', and 'fingered' referred to having fingers. The compound 'unusual-fingered' retains these meanings.