for·mi·da·ble 
/ˈfoɚmədəbəl, foɚˈmɪdəbəl/ adjective
/ˈfoɚmədəbəl, foɚˈmɪdəbəl/ adjective [more formidable; most formidable] 1 : very powerful or strong : deserving serious attention and respect
▪ a formidable enemy/opponent/weapon 2 : very difficult to deal with
▪ The mountains were a formidable barrier. ▪ a formidable challenge/task 3 : large or impressive in size or amount
▪ He has mastered a formidable amount of material.
▪ a formidable enemy/opponent/weapon
▪ The mountains were a formidable barrier. ▪ a formidable challenge/task
▪ He has mastered a formidable amount of material.
— for·mi·da·bly /ˈfoɚmədəbli, foɚˈmɪdəbli/ adverb
▪ a formidably long list
/ˈfoɚmədəbli, foɚˈmɪdəbli/ adverb ▪ a formidably long list
