excogitation

Etymology
From.

Noun

 * 1) Careful thought or consideration.
 * 2) * c. 1672, William Petty - Wikisource-logo.svg Political Arithmetick, p. 21.
 * the subtile excogitations of the Hollanders
 * 1) * 186?, Charles Dickens, Our Mutual Friend
 * To the excogitation of this problem, this harmless gentleman had devoted many anxious hours

Etymology
From.