in·gen·ious 
(ĭn-jēnyəs)
(ĭn-jēnyəs)adj.
1. Having great inventive skill and imagination: an ingenious negotiator.
2. Marked by or exhibiting originality or inventiveness: an ingenious solution to the problem.
3. Obsolete Having genius; brilliant.
[Middle English, from Old French ingenios, from Latin ingeniōsus, from ingenium, inborn talent; see genə- in the Appendix of Indo-European roots.]
in·genious·ly adv.
in·genious·ness n.