Poe employs metaphor in the story to evoke vivid imagery and deepen the story's thematic resonance. The candles, initially described as "white slender angels," symbolize hope and illumination in the darkness of the dungeon. However, as their light diminishes, Poe employs the metaphor of "bloody tears" to convey the narrator's growing despair and the impending threat of death. Similarly, the pendulum is metaphorically likened to a "tiger," emphasizing its menacing and predatory nature. This comparison not only highlights the pendulum's lethal potential but also underscores the narrator's sense of vulnerability and helplessness in the face of imminent danger.
Alliteration helps to enhance the story's atmosphere and emphasize key moments and imagery. Through repetitive consonant sounds, such as the "s" in "slow sweep" or "h" in "horror held," Poe creates a sense of rhythm and momentum that draws readers deeper into the narrative's unfolding horrors. Additionally, alliteration is used to evoke specific sensations and emotions, as seen in words like "scythe" and "scimitar" when describing the blade-like pendulum. The sharp, cutting sounds of these words mirror the menacing nature of the pendulum itself, heightening the reader's sense of dread and anticipation.
Poe skillfully alludes to the horrors of the Spanish Inquisition to enrich the narrative and anchor it within a broader historical context. By referencing this dark period of religious persecution, Poe imbues the story with a sense of authenticity and historical weight, heightening the reader's sense of dread and foreboding. The allusions to the Spanish Inquisition invite readers to reflect on the broader implications of unchecked power and the consequences of fanaticism and intolerance. In addition, the allusions to General Lassalle's military exploits (although he did not capture Toledo in reality) lend a sense of immediacy and relevance to the story, reminding readers of the enduring triumph of the human spirit.
Foreshadowing is used to create suspense and anticipation, hinting at the impending danger and eventual resolution of the narrative. Through repeated references to motion and movement, such as the ominous swinging of the pendulum, Poe foreshadows the imminent peril that the narrator will face. The subtle hints at the motion of the pendulum serve as a warning of the looming threat, building tension and anticipation. Similarly, the trumpets and commotion at the story's climax foreshadow the eventual rescue of the narrator, signaling a shift in the narrative's trajectory and providing a glimmer of hope amidst the darkness.