/ˌæsərˈteɪnmənt/ – Noun
Definition: 1. việc xác lập, việc xác định, việc xác minh, việc làm rõ;
2. việc cụ thể hóa (sự vật, hàng hóa).
A more thorough explanation: Ascertainment is the act of determining or discovering something with certainty, typically through investigation, examination, or verification.
Example: The lawyer conducted a thorough ascertainment of the evidence before presenting it in court.