hȯˈrendəs, häˈ-, həˈ- adjective
Etymology: Latin horrendus, from gerundive of horrēre to bristle, tremble — more at horror
: being such as to inspire horror : dreadful , fearful , frightful , horrible
began slapping some horrendous taxes on these huge estates — A.C.Spectorsky
a … horrendous blending of Hollywood and history — Charles Lee
• hor·ren·dous·ly adverb