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to ascertain
01
to determine something with certainty by careful examination or investigation
Transitive: to ascertain sth
Example
The detective ascertained the identity of the culprit through fingerprint analysis.
By conducting experiments, scientists ascertained the effectiveness of the new drug.
02
to make someone sure or confident about something
Transitive: to ascertain sb of sth
Example
The teacher ascertained the students of their success in the final exam.
I will ascertain you of the meeting schedule once it's confirmed.
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