a) Frightful and shocking
Ex: During this month alone, four gruesome incidents took place in the district.
Ex: The most gruesome murder
Ex: Model mauled by dog shares gruesome injury pictures
Ex: The gruesome assault was captured by a security camera.
b) full of or causing problems; distressing (unpleasant)
Ex: Terrifying Raw cannibal film trailer is so gruesome it’s making people vomit and pass out
Ex: gruesome catering
Ex: a gruesome day at the office.
Immersion in English - Makes You Perfect 