calamitous

Causing or involving calamity; disastrous.

The city was struck by a calamitous cyclone.

[T]he fallacie of Æquivocation and Amphibologie, […] conclude from the ambiguity of ſome vvord, or the ambiguous ſintaxis of many put together. From this fallacy aroſe the calamitous error of the Jevves, miſapprehending the Propheſies of their Meſſias, and expounding them alvvayes unto literall and temporal expectation.

Of a person: involved in a calamity; hence, distressed, miserable.

Nor ought a Judge, in taking cognizance of a Cauſe, to ſhevv any Anger or Reſentment againſt ſuch Perſons as he conceives to be his Enemies, nor to be prevailed on by the Tears and Prayers of calamitous Perſons, nor ought he to affect to be thought Good-natured or Moroſe, Merciful or Severe, but let him act vvith Calmneſs as the Lavv directs; […]

Thou haſt ſeen me happy and calamitous, thou haſt beheld my exaltation and my fall.