"Impossible," said Mary, relapsing into her usual tone; "husbands are an inferior class of men, who require keeping in order."
Lydgate, relieved from anxiety about her, relapsed into what she inwardly called his moodiness—a name which to her covered his thoughtful preoccupation with other subjects than herself, as well as that uneasy look of the brow and distaste for all ordinary things as if they were mixed with bitter herbs, which really made a sort of weather-glass to his vexation and foreboding.
There are no more uses of "relapse" in the book.
Show samples from other sources
She returned to the hospital due to difficulty breathing after a relapse of the flu.
She stayed clean for over a year, but had a relapse in December and is now in a drug treatment center.