'horse-aided' is a compound word formed from 'horse' and 'aided', where 'horse' refers to the animal used for riding or carrying loads, and 'aided' means 'helped or assisted'.

'Horse-aided' combines the Old English word 'hors' and the Middle English word 'aiden', eventually forming the modern English compound adjective 'horse-aided'.

Initially, it meant 'helped by a horse', and this meaning has largely remained the same in modern usage.