- causing concern or fear or terror
- afraid; frightful.
1650s, from Latin horrendus "dreadful, fearful, awful," virtually "to be shuddered at," gerundive of horrere "to bristle with worry, shudder" (see scary). Earlier form in English ended up being horrend (mid-15c.).
(a.) afraid; frightful.
A hollow tearing sound was followed by a horrendous crash outside the kitchen window.