Adjective: formidable for-mi-du-bul or for'mi-du-bul or fu(r)'mi-du-bul
- Extremely impressive in strength or excellence
"a formidable opponent"; "the challenge was formidable"; "had a formidable array of compositions to his credit"; "the formidable army of brains at the Prime Minister's disposal"
- Inspiring fear
"the formidable prospect of major surgery";
- redoubtable, unnerving, doubtable [archaic]