Pickton is the perpetrator of one of the most gruesome killing sprees ever to grip North America.
He walked away, and later approached me again to tell me about the gruesome death of one of his soldiers.
(gruesome NSFW or really NSF much of anywhere viewing here).
1560s, with -some (1) + Middle English gruen "feel horror, shudder" (c.1300); not recorded in Old English or Norse, possibly from Middle Dutch gruwen or Middle Low German gruwen "shudder with fear" (cf. German grausam "cruel"), or from a Scandinavian source (cf. Danish grusom "cruel," grue "to dread," though others hold that these are Low German loan-words). One of the many Scottish words popularized in England by Scott's novels.