Wiktionary
disasterous
a. (misspelling of disastrous English)
Usage examples of "disasterous".
She had told Esmay, the day of the disasterous argument, that she didn't want children .
She didn't have to jump the wall today, and it would be disasterous if she were caught unprepared.
He commenced to tell her the whole disasterous affair, not the romantic tale of a swashbuckler or courageous knight a girl like Marianne would like to hear.