The Collaborative International Dictionary of English v.0.48:

Grisly \Gris"ly\, a. [OE, grisly, grislich, AS. grislic,
   gryslic, fr. gr?san to shudder; cf. OD. grijselick horrible,
   OHG. grisenl?ch, and also AS. gre?san to frighten, and E.
   gruesome.]
   Frightful; horrible; dreadful; harsh; as, grisly locks; a
   grisly specter. "Grisly to behold." --Chaucer.
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         A man of grisly and stern gravity.       --Robynson
                                                  (More's
                                                  Utopia).
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   Grisly bear. (Zool.) See under Grizzly.
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