adjective. Arousing fear or awe; formidable.

adjective. Worthy of respect or honor.

That is to bo dreaded; formidable; terrible: as, a redoubtable hero; hence, valiant: often used in irony or burlesque.

Worthy of reverence.

adjective. Formidable; dread; terrible to foes; ; hence, valiant; -- often in contempt or burlesque.

adjective. Eliciting respect or fear; imposing; awe-inspiring.

adjective. worthy of respect or honor

adjective. inspiring fear

"General Byng's attack covered the whole length of what had become known as the redoubtable and supposedly impregnable "Hindenburg line," so called because it had been established by that greatest of all German military geniuses, Field Marshal von Hindenburg."

alarming  reputable  

Burgundian  Moorish  astute  dauntless  discomfit  

appalling  astounding  awe-inspiring  awesome  awful  

redoutable