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nirvana - (in Buddhism) a transcendent state in which there is neither suffering, desire, nor sense of self, and the subject is released from the effects of karma and the cycle of death and rebirth; it represents the final goal of Buddhism
As the Buddha meditated under the banyan tree, a serene glow seemed to appear around him when he finally achieved nirvana.
tinker - To attempt to repair or improve something in a casual way, often to no useful effect
Mitch tried to tinker with his computer before realizing that it was more broken that he had thought, and that he had to bring it to the computer store to have a professional repair it.