What does O tomb vaulted bride-bed in eternal rockmean?

The phrase "O tomb vaulted bride-bed in eternal rock" evokes imagery of a burial site that serves as both a final resting place and a metaphorical bed for a bride. It suggests a fusion of love and death, where the tomb symbolizes both a sanctuary and a permanent union. The use of "eternal rock" emphasizes the permanence of this resting place, highlighting themes of mortality and the enduring nature of love beyond life. Overall, it reflects the intersection of life, death, and the lasting bonds that can transcend both.