Able to be contrived; capable of being devised, invented, or constructed by clever planning or ingenuity.
From contrive + -able (capable of being), with contrive from Old French controver, possibly from Latin contra- + trobare. The -able suffix makes it an adjective of possibility.
Something contrivable is something clever people can figure out—it's the difference between 'impossible' and 'just requires ingenuity and scheming.'
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