Liberate

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late 16th century: from Latin liberat- ‘freed’, from the verb liberare, from liber ‘free’.

wiktionary

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Borrowed from Latin līberātus, past participle of līberō(“to set free, deliver”), from līber(“free”); see liberal.

etymonline

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liberate (v.)

"set free, release from restraint or bondage," 1620s, from Latin liberatus, past participle of liberare "to set free" (source also of Spanish librar, French livrer), from liber "free, not a slave, unrestricted" (see liberal (adj.)). Meaning "to free an occupied territory from the enemy" (often used ironically) is from 1942; hence the World War II slang sense "to loot." Related: Liberated; liberating.