formid-

1. Difficulty in undertaking a task, surmountability, or defeatability.
2. Inspiring awe, admiration, or wonder.

1. Difficult to deal with or to overcome; such as, preparing for war is a formidable task.
2. Inspiring respect or wonder because of size, strength, or ability: "She exhibited a formidable display of skill as she worked with her computer."
3. Causing fear, dread, or alarm.

1. Causing fear, dread, or apprehension; such as, a formidable prospect.
2. Having qualities that discourage an approach or an attack.
3. Tending to inspire awe or wonder; very impressive (having the power to excite attention, awe, or admiration).

1. In a formidable manner.
2. In a manner to impress fear.
3. Causing fear or respect for something or someone as a result of being impressive, powerful, or difficult.

Not to be feared or dreaded; not formidable.