Main Entry: re·doubt·able

Pronunciation: \ri-ˈdau̇-tə-bəl\

Function: adjective

Etymology: Middle English redoutable, from Anglo-French, from reduter to dread, from re- + duter to doubt

Date: 15th century

1 : causing fear or alarm : formidable
2 : illustrious, eminent; broadly : worthy of respect

— re·doubt·ably \-blē\ adverb