조사나 점검을 통해 사실 여부를 확실히 알아내거나 확인하다.
To find out or learn something with certainty through investigation, examination, or testing.
예문:
"The committee is working to ascertain the facts before making a final decision."
"It is difficult to ascertain the exact cause of the engine failure without a full inspection."
"The doctor performed several tests to ascertain whether the tumor was malignant."