The word "fell"has a varying form of usage depending on context.It could be a verb... the past form of "fall"...it could also be used for pulling down trees(register)..."felling a tree"It could also be used as an adjective meaning "cruel...mean...callous...etc.Simila
rly,the expression in/at a fell swoop" is an idiomatic expression meaning something done at once,without any ado.
No, rhapsomatrics. Here, "fell" is an adjective meaning "evil", "sinister".
Hmmm... ahh yes! Of course, the flavors flow in that direction,mmhyess... and in one FELL swoop, the graph of our ice cream flavors end up here.
Alright, that's all for today's lesson class, remember to complete your 256 questions for homework that are due tomorrow and eat chocolate and strawberry flavored ice cream!