'incorrectly-fitted' originates from the combination of 'incorrectly' and 'fitted', where 'incorrectly' is derived from 'incorrect', meaning 'not correct', and 'fitted' is the past participle of 'fit', meaning 'to be the right size or shape'.

'incorrectly' changed from the Old French word 'incorrigible' and eventually became the modern English word 'incorrect'. 'Fitted' comes from the Old English 'fittian', meaning 'to fit'.

Initially, 'incorrectly' meant 'not correct', and 'fitted' meant 'to be the right size or shape'. Over time, 'incorrectly-fitted' evolved to mean 'not properly adjusted or installed'.