DISASTROUS

adj. 1 calamitous, catastrophic, cataclysmic, tragic, destructive, ruinous, devastating, appalling, harrowing, awful, terrible, dire, horrendous, horrible, horrifying, dreadful, fatal There has been a disastrous earthquake which killed thousands 2 awful, terrible, unlucky, unfortunate, detrimental, grievous, harmful The postal strike has had disastrous effects on the mail-order business