adjective
1.
Synonyms: fearful 3, appalling, awful, dreadful, formidable, frightful, horrible, horrific, shocking, terrific
2.
Synonyms: hard 6, arduous, difficult, formidable, heavy, laborious, severe, strenuous, toilsome, tough
3.
Synonyms: intense 1, concentrated, desperate, exquisite, fierce, furious, vehement, vicious, violent
4.
Synonyms: ghastly 1, grim, grisly, gruesome, hideous, horrible, horrid, horrifying, macabre, terrifying