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Word

disastrous

adjective C1
UK /dɪˈzɑː.stɹəs/
US /dɪˈzæs.tɹəs/

Meanings

adjective

Causing very serious harm, damage, or failure.

disastrous: Causing very serious harm, damage, or failure.
adjective

Extremely unsuccessful or leading to a major setback.

disastrous: Extremely unsuccessful or leading to a major setback.

Definition

Causing great harm, damage, or failure.

If something is disastrous, it leads to very bad results and often causes serious damage or failure. It is much stronger than simply saying something is "bad" or "unfortunate." People use it for events, decisions, or situations that have severe negative consequences. It can describe both large public events and major personal setbacks.

Examples

  • The new rollout was disastrous, because the system crashed repeatedly during peak hours.
  • I made a disastrous choice of words in the meeting, and the tone changed immediately.
  • She faced a disastrous delay when her connecting flight was cancelled and no alternatives were available.
  • They had a disastrous weekend trip after their car broke down far from the nearest town.

Common mistake

Learners often overuse "disastrous" for minor problems; reserve it for very serious damage or major failure.