from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Arousing fear, dread, or alarm: the formidable prospect of major surgery.
- adj. Inspiring awe, admiration, or wonder: "Though a true hero, he was also a thoroughgoing bureaucrat and politician, a formidable combination” ( Mario Puzo).
- adj. Difficult to undertake, surmount, or defeat: a formidable challenge; a formidable opponent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality; commanding respect
- adj. difficult to defeat or overcome
from the GNU version of the Collaborative International Dictionary of English
- adj. Exciting fear or apprehension; impressing dread; adapted to excite fear and deter from approach, encounter, or undertaking; alarming.
from The Century Dictionary and Cyclopedia
- Exciting or fitted to excite fear or apprehension; hard to deal with; difficult to overcome, perform, or the like: applied to persons or things possessing such strength, power, or capability, or presenting such obstacles to action or progress, as to discourage effort or inspire dread of failure.
- Synonyms Deterrent, discouraging, fearful, appalling, redoubtable.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. extremely impressive in strength or excellence
- adj. inspiring fear
Middle English, from Old French, from Latin formīdābilis, from formīdāre, to fear, from formīdō, fear.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin formīdābilis ("formidable, terrible"), from formīdō ("fear, dread"). (Wiktionary)