'unamputated' is formed by the negative prefix 'un-' (from Old English) attached to 'amputated,' which ultimately comes from Latin 'amputare,' where 'am-' is a variant of ad- meaning 'to' and 'putare' meant 'to prune/cut'.

'amputare' in Latin (meaning 'to cut off') passed into later European usage (e.g., French 'amputer') and then into English as 'amputate'; the adjective 'amputated' came from the past participle, and the modern compound 'unamputated' was formed by adding the Old English negative prefix 'un-' to that past participle.

Initially related to the act 'to cut off' (Latin), the root developed into the surgical sense 'to surgically remove a limb' in modern English; 'unamputated' therefore came to mean 'not having been cut off or surgically removed.'