Horrendous means shockingly bad or frightening. Horrendous injuries, a horrendous mistake, horrendous traffic.
It is one of the strongest words in ordinary use and is applied to traffic and to weather constantly, which weakens it for the things that deserve it. The Latin behind it means to be dreaded, and horror and horrid are relatives.
1adjectivehorrendousShockingly bad or frightening.
“The weather was horrendous, with freezing rain and gales all week.”
horrendous is a quality.
Also accepted in games: horrific
Latin horrendus means to be dreaded, from horrere, to bristle or shudder.
Latin
horrendus
English, today
horrendous
Built from
Borrowed from Latin horrendus, future passive participle (gerundive) of horreō (“to dread”) -ous.
Etymology from Wiktionary, CC BY-SA