The word "redoubtable" is often misspelled as "re doubtable." The correct spelling is pronounced as /rɪˈdaʊtəbəl/ (ri-DAWT-uh-buhl). The prefix "re-" usually means "again" or "back," but in this word, it means "intensifying." The root word "doubt" means to feel uncertain about something. By adding the suffix "-able," it means able to be doubted. So, "redoubtable" means something that is feared or respected due to its power or abilities, making it an intimidating and formidable opponent.
The word "redoubtable" is derived from the Middle English term "redoutable" which came from the Old French word "redotable". It was formed by combining the prefix "re-" (meaning "again" or "intensive") and the word "douter" (meaning "to fear"). Ultimately, "douter" can be traced back to the Latin word "tremulare", meaning "to tremble". Hence, "redoubtable" originally meant "to be feared again" or "inspiring fear once more". However, over time, the meaning of the word has evolved to generally express respect or admiration for someone's abilities or qualities.