'evenly-associated' originates from the combination of 'evenly' and 'associated', where 'evenly' means 'in equal parts' and 'associated' means 'connected or related'.

'evenly' and 'associated' have been used in English since the Middle Ages, with 'evenly' deriving from Old English 'efen' and 'associated' from Latin 'associatus'.

Initially, 'evenly' meant 'level or equal', and 'associated' meant 'joined or connected'. Over time, they combined to describe a balanced relationship.