Does this mean "She tries to wake up the friend she buried" or "She tries to wake up"?
Here, "try to wake up" means she's going to try to wake up. This song is written from the perspective of a monster under her or someone's bed, therefore "try to wake up" here could refer to her trying to wake up from a nightmare. Billie Eilish said that she is not going to reveal the meaning of the lyrics in this song because she wants everyone to interpret them their own way, therefore you are free to have your own interpretation of these lyrics and this song.
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