English Reference
adjective

formidable

adj.
US /ˈfɔɹmədəbəɫ/ UK /fɔːmˈɪdəbəl/ for·mi·da·ble

  1. 01 C1 Advanced Formal

    very powerful or impressive in a way that makes you feel respect or a little bit of fear.

    inspiring fear, dread, or awe through impressive size, power, or capability.

    Simple

    The champion was a formidable opponent who had never lost a match.

    In context

    The CEO had a formidable reputation for efficiency, which made even the most senior managers nervous during their annual reviews.

    weakunimpressive
  2. 02 C1 Advanced Formal

    very difficult to deal with or defeat.

    presenting a significant obstacle or challenge that is difficult to surmount.

    Simple

    The team faced a formidable task when they had to rebuild the bridge in two days.

    In context

    Climbing the north face of the mountain remains a formidable challenge, even for the most experienced mountaineers using modern equipment.

The front runners are dynamic politicians and formidable leaders.

Toronto Sun· 14 Aug 2026

Hidden inside the fossil were pincerlike limbs and preserved soft tissues that help explain how the ancestors of spiders and scorpions evolved into formidable hunters.

ScienceDaily· 4 Aug 2026

From Middle English formidable, from Old French formidable, formible, from Latin formīdābilis (“formidable, terrible”), from formīdō (“fear, dread”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin formīdābilis
Level C1 · Advanced
Frequency Frequent
Updated