Synonyms of calamitous in English:

calamitous


See definition of calamitous

adjective

1‘the consequences of his decision were calamitous’

SYNONYMS
disastrous, catastrophic, cataclysmic, devastating, dire, tragic, fatal, ruinous, crippling, awful, dreadful, terrible, woeful, grievous
literary direful
ANTONYMS

good, advantageous