Cark

[W]ho vvould not rather Sleep Quietly upon a Hammock, vvithout either Cares in his Head, or Crudities in his Stomach, then lye Carking upon a Bed of State, vvith the Qualms and Tvvinges that accompany Surfeits and Exceſs?

Source: wiktionary

Carnal pleasures are the sins of youth: ambition and the love of power, the sins of middle age: covetousness and carking cares, the crimes of old age.

Source: wiktionary

[W]e shall see how in morbid melancholy this sense of the unreality of things may become a carking pain, and even lead to suicide.

Source: wiktionary

Thanks to that penny he had just spent so recklessly [on a newspaper] he would pass a happy hour, taken, for once, out of his anxious, despondent, miserable self. It irritated him shrewdly to know that these moments of respite from carking care would not be shared with his poor wife, with careworn, troubled Ellen.

Source: wiktionary