Liberate Te Ex Inferis is the fourth full-length album by metalcore band Zao. It is considered to be their most experimental and darkest album. It was released on Solid State/Tooth & Nail. With the album came the addition of bassist Rob Horner. Liberate is the first Zao album to feature Scott Mellinger, who replaced Brett Detar after his decision to pursue The Juliana Theory full-time.
The album's title is grammatically incorrect. The sentence is Latin, and a rough English translation is "Free / yourself / from / Hell". However, the imperative "Liberate" is in the plural form, and its direct object "Te" is in the singular. The distinction isn't found in English (e.g. "you" can refer to one person or more than one person), which is why the rough translation shows no apparent problem. The Latin should read either (1) "Libera Te Ex Inferis", if it's meant to be about one person; or (2) "Liberate Vos Ex Inferis" if it's meant to be about more than one person. (It's possible there was an error when the sentence was transcribed wherein "Libera Te" was written as "Liberate", i.e. with no word division).
The theme of the album art is based on Dante's inferno, as the songs are grouped in pairs named after the rings in hell. Because of this arrangement, the album is often mistakenly labeled as a concept album. The band members themselves, however, had nothing to do with the idea and very little input on the artwork and layout.