contrivance

nouns

a device or control that is very useful for a particular job
the faculty of contriving; inventive skill
"his skillful contrivance of answers to every problem"
is a type of (narrower)
the creation of something in the mind
an elaborate or deceitful scheme contrived to deceive or evade
"his testimony was just a contrivance to throw us off the track"
an artificial or unnatural or obviously contrived arrangement of details or parts etc.
"the plot contained too many improbable contrivances to be believable"
is a type of (narrower)
an organized structure for arranging or classifying
"he changed the arrangement of the topics"; "the facts were familiar but it was in the organization of them that he was original"; "he tried to understand their system of classification"
any improvised arrangement for temporary use
the act of devising something
is derived from