- causing fear, apprehension, or dread: a formidable opponent.
- of discouraging or awesome strength, size, difficulty, etc.; intimidating: a formidable problem.
- arousing feelings of awe or admiration because of grandeur, strength, etc.
- of great strength; forceful; powerful: formidable opposition to the proposal.
- arousing or likely to inspire fear or dread
- extremely difficult to defeat, overcome, manage, etc
- tending to inspire awe or admiration because of great size, strength, excellence, etc
