She cannot dance, and hates it; but she is well-grounded in music.
Desiderius had to acknowledge that Lorand's excuse was well-grounded.
Tom was well-grounded in math, had to be for his job as pilot.
All that is as nothing to a well-grounded apprehension as to one's larder!
The truth is, the enmity is not so deep and well-grounded in the latter as in the former.