Past tense of the verb form 'complot', meaning to have formed or engaged in a conspiracy.
From 'complot' as a verb, with the past tense suffix '-ed', following regular English verb conjugation patterns.
Using 'complotted' as a past tense tells you that 'complot' functioned as both noun and verb in Renaissance English—speakers could say 'they complotted against the king' with the ease we use 'plotted.'
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