From Longman Dictionary of Contemporary Englishwell-foundedˌwell-ˈfounded adjective LOGICALa belief or feeling etc that is well-founded is based on facts or good judgment My suspicions proved to be well-founded.
Examples from the Corpus
well-founded• But, the Bremen scientists discovered, the fears were well-founded.• What is now beyond dispute is that the impressionistic evidence is well-founded.• I can't feel anything substantial in him, anything well-founded about him.• I was dealing with the definition of refugees under the 1951 convention, and concentrating on the well-founded fears of persecution.• You're hot, tired, hungry very probably, and here I am, not answering any of your well-founded questions.• In fact, their campaign and the probably well-founded suspicion that the result had been rigged had the opposite effect.• Such an assertion presupposes a well-founded theory of performance, one which was able to assign periods of time to mental processes. 