Rhetoric is the art of persuasion, so rhetorical devices are devices that persuade an audience.
Neruda is trying to persuade his audience that letting the Standard Oil Company into a South American country to drill for oil is an unfortunate idea that leads to violence, dehumanization, and regime change. All of this puts the country in the company's control.
To persuade us of this, Neruda uses negative imagery. Imagery is description that uses the five senses: sight, sound, taste, touch, and smell.
The poem begins with the sinister imagery of the oil company drilling for oil. Words like "dead years," "imprisoned plants' roots," "cold liquid," and "pale engineer" paint a picture in our minds of death and imprisonment. The imagery leaves a sensation of...
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