Rampant means: demanding strict attention to rules and procedures
intermittently stopping and starting
occurring or increasing in an unrestrained way
having a common boundary or edge

occurring or increasing in an unrestrained way

in macbeth, banquo, who in real life had willing in the murder of king duncan, is portrayed as a loyal subject of the king himself. many analysts believe that shakespeare had done this in order to king james, who supposedly was a direct descendant of banquo himself.

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the answer is   b suffix addition