DictionaryformidableInspiring respect or fear
adjective

formidable

FOR-mi-duh-buhl/ˈfɔːrmɪdəbl/

Powerful, capable, or challenging enough to inspire respect or fear.

The overhanging cliff presents a formidable challenge to the climbers below.

Two equipped climbers pause beneath a towering, nearly vertical rock face with a severe overhang.
Etymology

Built on “to fear,” formidable originally meant “causing fear.” Its force softened toward something so great in strength or size that it discourages effort, giving the modern sense of intimidating power or difficulty.

In context

Enhanced Public Domain220:44
the Assembly of the faithful true to plot the death of the new government was a difficult and perilous Enterprise still Agar was in a position to carry on a formidable conspiracy
1900s Satire Audiobook: Anatole France - Penguin Island

More examples

  • Repairing the aging bridge presents a formidable challenge.
  • The team faces a formidable defense in tonight's game.
  • He brings formidable research skills to the investigation.

Forms

formidable · more formidable · most formidable

formidably adverb — In an impressively powerful or challenging way

Similar words

daunting
Emphasizes difficulty that discourages someone from attempting a task.
intimidating
Emphasizes making someone feel afraid or less confident.
imposing
Emphasizes an impressive appearance or presence, especially physical size.