disasterous

Adjective

disastrous (comparative more disastrous, superlative most disastrous)

1. Of the nature of a disaster; calamitous.
   • In addition, he was also able to reinforce the unease among progressive Democratic-leaning voters over Clinton’s disastrous pro-interventionist positions, thereby suppressing turnout and encouraging third party support in some key swing states that made the difference in his Electoral College...2024 August 21, Daniel Falcone, “Trump Was Never a “Moderate” on Foreign Policy”, in Truthout

   Synonyms:

   cataclysmic, catastrophic

2. Foreboding disaster; ill-omened.
   • A fearsome sight it was to behold how he swelled in his wrath, and his eyes blazed like disastrous stars at midnight, and being wood with anger he gnashed his teeth till the froth stood at his lips and slavered down his chin.1922, E[ric] R[ücker] Eddison, The Worm Ouroboros: A Romance, London: Jonathan Cape […], →OCLC, page 27

   Synonyms:

   baleful, ill-boding, inauspicious, ominous, sinister, augurous, bodeful, boding, dire, divine

   Antonyms:

   auspicious, fortunate, auspicial, favorable, fortuitous, lucky, propitious, prosperous, serendipitous, teratical