ter·ri·ble 
(tĕrə-bəl)
(tĕrə-bəl)adj.
1. Causing great fear or alarm; dreadful: a terrible bolt of lightning; a terrible curse.
2. Extremely formidable: terrible responsibilities.
3. Extreme in extent or degree; intense: "the life for which he had paid so terrible a price" (Leslie Fiedler).
4.
a. Unpleasant; disagreeable: had a terrible time at the party; terrible food.
b. Very bad: a terrible actor.
[Middle English, from Old French, from Latin terribilis, from terrēre, to frighten.]
terri·ble·ness n.