Past tense of 'even'; made level, equal, or fair; smoothed out or balanced.
From 'even' (verb) + '-ed' past tense suffix. Modern English form of the older 'evene,' following the regular weak verb pattern.
The '-ed' ending is so automatic to modern English speakers that we don't notice how it turns 'even' into a past action, but in Middle English, verbs had different endings depending on person and number—'evened' is a simplified survivor.
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