The word 'clumsily-used' is a compound formed from 'clumsily' (adverb form of 'clumsy', from Scandinavian origin) and 'used' (past participle of 'use', from Old French 'user').

'Clumsily' comes from 'clumsy' (early 18th century, from 'clums' meaning 'numbness' or 'stiffness'), and 'used' is the past participle of 'use', which entered English via Old French from Latin 'uti'. The compound 'clumsily-used' is a modern English formation.

Initially, 'clumsily' meant 'in a clumsy manner' and 'used' meant 'employed or utilized'. Together, 'clumsily-used' has come to mean 'used in an awkward or unskillful way'.