liberate (v.)youdaoicibaDictYouDict[liberate 词源字典]
1620s, from Latin liberatus, past participle of liberare "set free," from liber "free" (see liberal). Meaning "to free an occupied territory from the enemy" (often used ironically) is from 1942. Related: Liberated; liberating.[liberate etymology, liberate origin, 英语词源]