Past tense of bemix; to mix thoroughly or confuse by mixing together.
From Middle English 'be-' (prefix meaning to make or cause) + 'mixed' (past tense of mix, from Old English 'miscian'). The 'be-' prefix was commonly used in Middle English to create verbs with intensive or causative meanings.
The 'be-' prefix was incredibly productive in Middle English—people could add it to almost any adjective or noun to create a verb, but most of these creations didn't survive into modern English. 'Bemixed' is a ghost word from that creative period of English wordformation.
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