ENGLISH
REFERENCE

challenging

adj. · n.
US //ˈtʃæɫəndʒɪŋ// UK //tʃˈælɪndʒˌɪŋ// chal·leng·ing
  1. 1 difficult but rewarding (adj.)
    B2 Upper Intermediate

    difficult in a way that tests your ability or determination.

    demanding considerable effort, skill, or endurance, often with the implication of being stimulating or worthwhile.

    Example

    The hike was challenging because the path was very steep and rocky.

    Example

    The board of directors faced a challenging fiscal year, requiring them to restructure the entire department while maintaining employee morale.

  2. 2 the act of testing (n.)
    C1 Advanced Formal

    the act of questioning something or testing someone's skills.

    the action of disputing a statement or testing the boundaries of a rule or ability.

    Example

    His challenging of the referee's decision led to a long argument on the field.

    Example

    The legal team's persistent challenging of the evidence eventually forced the prosecution to drop the most serious charges.

Origin

From Middle English chalengynge; equivalent to challenge + -ing.

© 2026 English Reference