redoubtable

  • (s) inspiring fear
    • the formidable prospect of major surgery
    • "a tougher and more redoubtable adversary than the heel-clicking, jackbooted fanatic"- G.H.Johnston
    • something unnerving and prisonlike about high grey wall
    unnerving, formidable,
  • (s) worthy of respect or honor
    • born of a redoubtable family

Synonyms

unnerving formidable

Words of close approximity