'slender-toed' originates from English, specifically the words 'slender' and 'toe', where 'slender' meant 'thin' and 'toe' (from Old English 'tā') meant 'digit of the foot'.

'slender' comes from Middle English 'slender' (possibly influenced by Old Norse 'slendra'), and 'toe' comes from Old English 'tā'; the modern compound adjective 'slender-toed' was formed in Modern English by combining these elements.

Initially, 'slender' meant 'thin' and 'toe' meant 'digit of the foot'; when combined as 'slender-toed' the meaning has remained essentially 'having thin toes'.