Please Explain Aurra Sing to Me

I'm getting way more into building up BHs, it started as a thing to get ready for next Chewbacca event, now I'm just finding ways to actually enjoy the game with them, their kits are just so layered with abilities and payouts. I took a look at Aurra today, who I unlocked back when she was released but haven't touched since. Sounds like a potentially great attacker, but I can't make heads nor tails of her kit. There are several abilities relating to things not explained anywhere. What is "toppled," and how is an enemy "toppled?" Also, some of her abilities relate to being stealthed, but I see no way in which she gains stealth. Seems like the devs really slept on writing up the ability descriptions on this one, as well as explanations in her kit release.