formidable

Meanings

Adjective Satellite

• 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; ; - G.H.Johnston
  • "the formidable prospect of major surgery"

Adj

• Causing fear, dread, awe, or discouragement as a result of size, strength, or some other impressive feature; commanding respect; causing wonder or astonishment.
• Difficult to defeat or overcome.

Synonyms

redoubtable, unnerving