The decrepit father was wheeled in to see Svidrigailov by the tender and sensible mother, who as usual began the conversation with various irrelevant questions.
To give her pleasure Razumihin told her how Raskolnikov had looked after the poor student and his decrepit father and how a year ago he had been burnt and injured in rescuing two little children from a fire.
Razumihin somehow discovered and proved that while Raskolnikov was at the university he had helped a poor consumptive fellow student and had spent his last penny on supporting him for six months, and when this student died, leaving a decrepit old father whom he had maintained almost from his thirteenth year, Raskolnikov had got the old man into a hospital and paid for his funeral when he died.
There are no more uses of "decrepit" in the book.
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The decrepit computer can’t handle iTunes updates.