This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Causing or involving calamity; disastrous.

adj. Concerning or involving calamity, disastrous.

adj. Suffering calamity; wretched; miserable.

adj. Producing, or attended with distress and misery; making wretched; wretched; unhappy.

Miserable; involved in calamity or deep distress; wretched.

Of the nature of or marked by calamity or great misfortune; bringing or resulting from calamity; making wretched; distressing or distressful: as, a calamitous event; “that calamitous prison,” Milton, S.A.,1. 1480; “this sad and calamitous condition,” South.

Synonyms Afflictive, disastrous, distressing, grievous, deplorable, baleful, ruinous.

adj. (of events) having extremely unfortunate or dire consequences; bringing ruin

"By this it appears that it was advisable and seasonable only in calamitous times, and times of present distress, 1"

unfortunate   

unhappy    distressful    deplorable    sad    grievous    adverse    unfortunate    miserable    wretched    afflictive   

deplorable    disastrous    catastrophic    untoward    unforeseen    direful    cataclysmic    regrettable    irreparable    unavoidable