source: ingenious - Album on Imgur

(of a person) clever, original, and inventive:

〈人が〉発明の才能のある, 創意に満ちた

e.g. he was ingenious enough to overcome the limited budget.

(of a machine or idea) cleverly and originally devised and well suited to its purpose.

〈方法･計画･装置などが〉見事な, うまくできた

ingeniousness |inˈjēnyəsnəs| noun

Ingenious and ingenuous are often confused. Ingenious means ‘clever, skillful, resourceful’ ( an ingenious device), while ingenuous means ‘artless, frank’ ( charmed by the ingenuous honesty of the child).

late Middle English: from French ingénieux or Latin ingeniosus, from ingenium ‘mind, intellect’; compare with engine.