disprove
verb (used with object)
to prove (an assertion, claim, etc.) to be false or wrong; refute; invalidate.
Used to describe an ongoing action or continuous state that was happening at a specific time in the past.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Unconsciously as yet even to herself, she was disproving his "superior clay" theory.
From Opening a Chestnut Burr by Edward Payson Roe