O horror, horror, horror! Tongue nor heart cannot conceive nor name thee!
Act II, Scene 3 · Macduff
Context
Macduff exits Duncan's chamber and tries to express his shock at discovering the king's murder, but finds himself unable to articulate what he has seen.
Analysis
The triple repetition of 'horror' works not as emphasis but as verbal collapse: Macduff gets stuck on the word because language has failed him. His claim that 'tongue nor heart cannot conceive nor name thee' doubles the negation ('nor… nor'), enacting linguistically the impossibility he describes—the sentence itself can barely hold together. This moment of breakdown positions Macduff as a reliable witness precisely because he can't perform his reaction smoothly; his rhetoric fractures under the weight of what he's seen, unlike Macbeth's polished lies.
Essay Tip
Use this to argue that Shakespeare distinguishes genuine feeling from performance by showing how language works under pressure—Macduff's speech breaks down and repeats itself, which marks him as truthful, while Macbeth's eloquent metaphors later reveal him as someone who has had time to prepare.