formidable

• This officer had been employed in the pursuit of the marauders for a considerable time, and his gigantic stature, courage, and energy, rendered his name formidable: he received from the public a valuable present, and a pension from the colonial fund The roads were infested, and communication was dangerous: travellers were arrested and tied to trees; and sometimes, though not frequently, treated with cruelty. —  The History of Tasmania , Volume II
• Stony Ridge looked grey itself and formidable, and all about it was the smoke of the forty grey guns. —  The Long Roll
• The most formidable is the cobra capella (not the same as the Indian snake of the same name). —  The Mission; or Scenes in Africa
• The obstacle was all the more formidable, as the upper end was inclined towards them, greatly increasing the difficulty in using the chisel. —  On the Irrawaddy A Story of the First Burmese War
• During the night the enemy's fire could not have been formidable, and ... it would not have taken more than two or three hours at most to communicate by messenger with General Coke or Sir C. Warren, and to receive a reply. —  Story of the War in South Africa 1899-1900

Roget's II: The New Thesaurus

Allen's Synonyms and Antonyms

Used in the Same Context