The best possible antonym I could find was un-assembled and synonyms of the word.
"Contraption" is perhaps a blend of "contrivance", "trap", and "invention".
Rube Goldberg is infamous for his convoluted contraptions. Kindly remove your dilapidated contraption from the road at once!
Inventors are always trying to come up with some new contraption which will turn out to be in great demand by the general public.
That is the correct spelling of the noun "contraption" (an odd machine or gizmo).
I don't know what you call that contraption, but it works!
"Contraption" is perhaps a blend of "contrivance", "trap", and "invention".
Get that contraption off the road! I haven't any spare time to work on your contraption this week.
Example sentence - We could not figure out what the odd contraption was used for or where it came from.
Contrapion is not a word in the English language. Contraption is a word. A sentence that uses contraption could be, "Henry rigged up a contraption to catch mice".
The do it yourself handyman devised a contraption to measure the amount of rainfall in his apple orchard.
Rube Goldberg is infamous for his convoluted contraptions. Kindly remove your dilapidated contraption from the road at once!
A contraption is another word for a (contrived) device, so a sentence with that word could be, " In order to bend the wooden strips into the shape of the canoe we were building, I had to first steam them and then place them in a CONTRAPTION called a 'jig', which put force on the ends to bend them, while holding the center in a fixed position."
Inventors are always trying to come up with some new contraption which will turn out to be in great demand by the general public.
Accessory, apparatus, mechanism, implement, gadget, contraption
The people felt that the computer was a newfangled contraption
Fantastic Contraption happened in 2010.
I made a neat contraption for science class.