English Theasurus that shows all the ways the English word is translated from the original Greek and Hebrew.
English Theasurus from the Hebrew and Greek Strong's Dictionary
terribly 6206 -- \arats -- be affrighted (afraid, dread, feared, terrified), break,dread, fear, oppress, prevail, shake {terribly}.
terribly 7477 ra\al -- -- {terribly} shake.