If you're unfamiliar with "The Mortal Instruments" novels, the vocabulary of "Shadowhunters" -- Freeform's upcoming supernatural drama series, based on the hit YA book series -- may be a bit of a learning curve.

Thankfully, the folks at TVLine sat down with stars Dominic Sherwood, Katherine McNamara, Matthew Daddario, Harry Shum Jr. and author Cassandra Clare in a behind-the-scenes featurette, which breaks down all the terms you need to know before the series premieres next month.

Get brushed up on your "Shadowhunters"/"Mortal Instruments" jargon with TVLine's video, below:

"Shadowhunters" debuts January 12 at 9 p.m. ET on Freeform -- the network formerly called ABC Family.