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1.
establish after a calculation, investigation, experiment, survey, or study
2.
be careful or certain to do something; make certain of something
3.
find out, learn, or determine with certainty, usually by making an inquiry or other effort
4.
learn or discover with certainty
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derived forms
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1. Ascertain / Past
ascertained
2. Ascertain / Third Person
ascertains
3. Ascertain / Present Participle
ascertaining
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