disastrous

Definitions

Causing great damage, harm, or failure.

Highly unsuccessful or calamitous.

Examples

The company's decision to ignore market trends led to a disastrous drop in quarterly profits.

The picnic was a disastrous failure because of the unexpected heavy rain.

Synonyms

catastrophic devastating calamitous ruinous tragic cataclysmic fateful

Antonyms

beneficial advantageous successful favorable fortunate auspicious constructive