A knot invented by Violet Baudelaire.[1] She used it after Kevin cut her Devil's Tongue Knot.

It is named after "a singer [Violet] admire[s],"[1] likely referring to Yma Sumac.

Netflix Series Divergent Canon

The knot is used in a different context, when Violet is fashioning climbing gear.

Additionally, it is implied that Violet didn't invent the knot: Snicket says Violet "imagined my good friend Mrs. Comstock saying, 'Have you considered the Sumac knot?'" C.M. Comstock is the author of the book about Female Finnish Pirates, where Violet learned the Devil's Tongue Knot.

Sources

Community content is available under CC-BY-SA unless otherwise noted.