well-founded

adjective
well-found·ed | \ˈwel-ˈfau̇n-dəd \

Definition of well-founded 

: based on excellent reasoning, information, judgment, or grounds

First Known Use of well-founded

1608, in the meaning defined above

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The first known use of well-founded was in 1608

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well-founded

adjective

English Language Learners Definition of well-founded

: based on good reasoning, information, or judgment

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