'over-analytical' originates from English, specifically the compound of the prefix 'over-' and the adjective 'analytical', where 'over-' (from Old English 'ofer') originally meant 'above, beyond' and 'analytical' comes from Greek roots meaning 'able to loosen apart/analysis'.

'analytical' comes via Late Latin 'analyticus' from Greek 'analytikos' (from 'analyein' = 'to loosen up, resolve'), while 'over-' derives from Old English 'ofer'; the modern compound 'over-analytical' was formed in modern English by prefixing 'over-' to 'analytical' to indicate excess.

Initially, 'over-' meant 'above' or 'beyond' and 'analytical' referred to the capacity for analysis; over time the compound came to mean 'excessively analytical' (i.e., analyzing to an impractical or counterproductive degree).