formidable: Meaning and Definition of

for•mi•da•ble

1. causing fear, apprehension, or dread: a formidable opponent.
2. of discouraging or awesome strength, size, difficulty, etc.; intimidating: a formidable problem.
3. arousing feelings of awe or admiration because of grandeur, strength, etc.
4. of great strength; forceful; powerful: formidable opposition to the proposal.