Past tense: engaged in making a secret plan to prevent or oppose another plot.
Past tense of counterplot; formed by adding -ed to the verb root, following standard English verb conjugation patterns established by the 15th century.
Shakespeare's plays are filled with counterplotted intrigues—in Othello and Hamlet, characters constantly plot against plots, creating layers of deception that mirror real court life of the Elizabethan era.
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