Crossword Dictionary
terrible
severe, terrible, wicked - a
intensely or extremely bad or unpleasant in degree or quality; "severe pain"; "a severe case of flu"; "a terrible cough"; "under wicked fire from the enemy's guns"; "a wicked cough"
The original meaning of terrible was anything that causes terror. That meaning still applies, but mostly this is a word for anything really bad.
Terrible used to be reserved for things that caused fear and terror, but today we use the word to describe anything awful, lousy, or just plain bad. People like saying "That movie was terrible!" or "The Yankees are terrible!" If you get a D on a test, you might tell your friends the test (or teacher) is terrible. Or you might also say, "I am terrible at taking tests."
etymology
late 14c., "causing terror, awe, or dread; frightful," from Old French terrible (12c.), from Latin terribilis "frightful," from terrere "fill with fear," from PIE root *tros- "to make afraid" (source also of Sanskrit trasanti "to tremble, be afraid," Avestan tarshta "scared, afraid," Greek treëin "to tremble, be afraid," Lithuanian trišėti "to tremble, shiver," Old Church Slavonic treso "I shake," Middle Irish tarrach "timid"). Weakened sense of "very bad, awful" is first attested 1590s.