The word 'sub-commission' is a modern English compound formed by directly combining the Latin prefix 'sub-' with the noun 'commission'. The prefix 'sub-', deriving from the Proto-Indo-European root upo (under, below), has been a productive element in Latin and English for creating terms denoting lower rank or position. The noun 'commission' originates from Latin commissio (a bringing together, delegation), from the verb committere (to unite, entrust). Therefore, the literal construction "under-commission" logically evolved to signify a delegated body operating under the authority and within the scope of a primary commission, tasked with a more focused mandate.

Structure: sub (under) + commission (authority) - sub: A prefix from Latin, meaning "under, below, secondary." In this word, it functions to indicate a subordinate or secondary status. - commission: A noun from Latin committere (to bring together, entrust), via Old French. It refers to a group of people officially charged with a particular function or authority.