Her morning sickness turned into pernicious vomiting.
…of internship, when the thrills of fires and floods and murder became as obvious a routine as bookkeeping, when he had seen the strangely few ways in which mankind can contrive to injure themselves and slaughter one another, when it was merely wearing to have to live up to the pretentiousness of being The Doctor, Martin tried to satisfy and perhaps kill his guilty scientific lust by voluntary scrabbling about the hospital laboratory, correlating the blood counts in pernicious anemia.
There are no more uses of "pernicious" in the book.
Show samples from other sources
By the 21st century, it had evolved into a pernicious lack of employment.