"Well-founded" Natural Recordings by Native Speakers
WELL-FOUNDED
Adjective: Based on a firm or strong foundation; solidly established in fact or evidence.
Example: "Her arguments were well-founded, and she successfully convinced her audience."
Thoroughly educated or intellectually sophisticated; having obtained a high level of knowledge and refinement in a particular field or subject.
Well-established refers to something or someone that is firmly based, secure, and stable, having achieved a position of acceptance or recognition through years of experience, success, or reputation.