Meaning:

Bwerrwy: "Blast" + "Fuwwy" + "Berry"+ "Adventure" +"Determination" + "Yes" + "Ultimate" = "Bwerrwy"

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Variations:

Fuwwy - Bwerry - Bwerrwy - Bwerrix - Bwerrier - Bwerriest - Bwerritiest - Bwerriestiest - Bwerriestiestix!

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