The word 'uncapped' is a straightforward English formation built from the native negative prefix 'un-' and the past participle 'capped'. The core noun 'cap' traces back to Late Latin cappa, meaning a hood or a head-covering. The verb 'to cap' developed the figurative sense of "to set an upper limit," akin to placing a lid on something. Therefore, 'uncapped' literally means "not having a lid placed on it," a concept which evolved logically to describe both physical objects without covers and abstract concepts, such as earnings or potential, without a prescribed maximum limit.

Structure: un (not) + capped (having a cap) - un: A prefix of Germanic origin (Old English un-), meaning "not." It functions as a negative or reversing prefix. - capped: The past participle form of the verb 'cap', from the noun 'cap' (Old English cæppe, from Late Latin cappa). In this structure, it functions as an adjective meaning "having a cap" or "having a limit imposed."