disastrous (adj.)youdaoicibaDictYouDict[disastrous 词源字典]
1580s, "ill-starred," from French désastreux (16c.), from désastre (see disaster) or from Italian desastroso. Meaning "calamitous" is from c. 1600. Related: Disastrously.[disastrous etymology, disastrous origin, 英语词源]