— gruesomely , adv. — gruesomeness , n.
/grooh"seuhm/ , adj.
1. causing great horror; horribly repugnant; grisly: the site of a gruesome murder.
2. full of or causing problems; distressing: a gruesome day at the office.
Also, grewsome .
[ 1560-70; obs. grue to shudder (c. G grauen, D gruwen ) + -SOME 1 ]