To shiver; shudder; feel horror.

(impersonal) To pain; grieve.

verb. To be frightened; to shudder with fear.

noun. A shiver, a shudder

noun. A fictional predator that dwells in the dark.

noun. Any byproduct of a gruesome event, i.e. gore, viscera, entrails, blood and guts.

adjective. Of an object, green when first observed before a specified time or blue when first observed after that time.

adjective. Green or blue, as a translation from languages such as Welsh that do not distinguish between these hues.

"Knowing that exactly such a ruinous retaliation was coming-and to people she liked, or even loved-gave her what her father called the grue: a cold sense of oppressive horror, coiling through the blood."

Wikipedia article on grue  bleen  

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