Ill-founded

adj

adj ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Unsubstantiated, not based on fact or evidence.

    "ill-founded criticism"

Synonyms

All synonyms
baselessemptyflimsygroundlessidleunfounded

Example

More examples

"Sorry to say, that expectation was ill-founded."

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.