well-grounded

American  

[wel-groun-did] / ˈwɛlˈgraʊn dɪd /

adjective

1. based on good reasons; well-founded.

   His opposition to the scheme is well-grounded.

2. well or thoroughly instructed in the basic principles of a subject.

   She is well-grounded in mathematics.

---

well-grounded British  

adjective

1. well instructed in the basic elements of a subject

2. another term for well-founded

---

Etymology

Origin of well-grounded

Middle English word dating back to 1325–75

Example Sentences

At a separate news conference the same day, Bovino rejected the criticism about federal agents, saying, “Everything we do every day is legal, ethical, moral, well-grounded in law.”

From The Wall Street Journal

Border Patrol Chief Greg Bovino claimed on Tuesday that “everything we do every day is legal, ethical, moral, well-grounded in law.”

From Salon

David Davis, who worked closely with Mr Barnier for several years as the UK’s Brexit Secretary, told the BBC he was “a really solid Frenchman” who was “well-grounded in the real France”.

From BBC

"A well-grounded suspicion does warrant more follow-ups but also might not hit the high threshold for overturning the result."

From BBC

Despite these far-fetched ambitions, Rothblatt has funded a wealth of well-grounded research for decades, and her company United Therapeutics has propelled much of the recent progress in xenotransplantation.

From Scientific American