Amunet means "the hidden one" and while this had specific meanings in ancient Egypt, in modern America, it means a group of people who don't get to share in political power, i.e., the minorities who are the "hidden" ones in society. There is another interesting detail regarding her sarcophagus: if you notice at 0:20 (as the crew lifts up the sarcophagus and we see the backside of it from underneath) and again at 2:05 (when we see Amunet's back), it looks like surgery has been done on Amunet's spinal cord, and it was commemorated forever in her sarcophagus, that is, the scar from the surgery--or whatever bizarre ritual it might have been--is also on the back of the sarcophagus, reflecting Amunet's own body. I have absolutely no idea what it means, but it's a significant detail and one that we will need to pay attention to, as it will undoubtedly play out in the narrative.
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