The siblings devised [dɪˈvaɪz] a plan to clean the house from top to bottom with hopes of getting their parents to let them go to the concert.

devise [dɪˈvaɪz]
verb

To devise is to invent or plan something that is difficult or complicated in some way.

There’s something inventive about devise, a word that stems from Latin dividere, meaning “to divide.” By the time devise was being used in English, its Anglo-French forebear deviser had accumulated an array of senses, including “divide,” “distribute,” “arrange,” “order,” “plan,” “invent,” and “assign by will.”

English