Where does “disastrous” come from?

Disastrous comes from French désastreux, from Middle French desastre, from Italian disastro, from Latin astrum meaning star, ultimately from Ancient Greek ἀστήρ, with the prefix ad- attached.

disastrous (English): Of the nature of a disaster; calamitous;...

Definitions

  1. Of the nature of a disaster; calamitous;...

Ancestry of “disastrous”, step by step

StepLanguageWordMeaning
1EnglishdisasterAn unexpected natural or man-made catastrophe of...
2Middle Frenchdesastredisaster
3Italiandisastrodisaster; first-person singular present...
4Italianastrocelestial body, star; A person exceptionally...
5Latinastruma star
6Ancient GreekἄστρονA celestial body
7Ancient Greekἀστήρa celestial body; illustrious person; starfish
8Proto-Hellenicastḗrstar
9Proto-Indo-Europeanh₂stḗrstar
10Proto-Indo-Europeanh₂eHs-to be/become dry; to burn, to glow; hearth

Words derived from “disastrous

Every word from Proto-Indo-European h₂eHs-
disastrous — Etymology, Origin & Word History | Etymology Explorer