An alternate form of anarchic; characterized by the absence of government, authority, or order.
From anarchic + -al suffix; redundant doubling common in 16th-18th century English as -ic and -al suffixes were both applied to create emphatic variants.
English speakers once added extra suffixes for emphasis—'anarchical' is essentially saying 'anarchic-ic,' which is why modern English gradually dropped the 'al' as unnecessary.
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