noun, noun or participle which takes 'suru', transitive verb
reverse use; using contrary to intended purpose; turning to one's advantage
Often implies exploiting a system, rule, or tool in an unintended way for one's own benefit. Can be neutral or negative depending on context.
彼はルールを逆用して利益を得た。
He turned the rules to his advantage and profited.
この機能を逆用すれば、
If you use this feature in a reverse way, you can find a new application.