The power or ability to invent
The ingenuity of Madame Grotius at length devised a mode of escape.
In the body of the work he displays considerable ingenuity in reducing his problems to simple equations, which admit either of direct solution, or fall into the class known as indeterminate equations.
The narrative presents a number of difficulties, which early commentators sought to solve with more ingenuity than success.
As vice-chancellor of the university of Calcutta, Maine commented, with his usual pregnant ingenuity, on the results produced by the contact of Eastern and Western thought.
Much ingenuity has been spent upon the name and origin of the feast.