Sentence:  The latter part of the fifteenth century prepared a train of future events, that ended by raising France to a <WSD>formidable</WSD> power, which has ever since been, from time to time, the principal object of jealousy to the other European nations. 
Meaning of the word marked with <WSD> tags:  Causing fear, dread, awe, or discouragement as a result of size, strength, or some other impressive feature; commanding respect; causing wonder or astonishment.