[for.mi.da.ble] adj [ME, fr. L formidabilis, fr. formidare to fear, fr. formido terror, bogey; akin to Gk mormo bogey] (15c) 1: causing fear, dread, or apprehension "a ~ prospect"
2: having qualities that discourage approach or attack
3: tending to inspire awe or wonder -- for.mi.da.bil.i.ty n -- for.mi.da.ble.ness n -- for.mi.da.bly adv