formidable

adj 1: extremely impressive in strength or excellence; "a

formidable opponent"; "the challenge was formidable";

"had a formidable array of compositions to his

credit"; "the formidable army of brains at the Prime

Minister's disposal"

2: inspiring fear; "the formidable prospect of major surgery";

"a tougher and more redoubtable adversary than the

heel-clicking, jackbooted fanatic"- G.H.Johnston;

"something unnerving and prisonlike about high gray wall"

[syn: {redoubtable}, {unnerving}]