/ ɪnˈdʒiːniəs; NAmE / adjective
1.
( of an object, a plan, an idea, etc. ) very suitable for a particular purpose and resulting from clever new ideas :
an ingenious device
ingenious ways of saving energy
2.
( of a person ) having a lot of clever new ideas and good at inventing things :
an ingenious cook
She's very ingenious when it comes to finding excuses.
► in·geni·ous·ly adverb :
ingeniously designed
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WORD ORIGIN
late Middle English : from French ingénieux or Latin ingeniosus , from ingenium mind, intellect; compare with engine .