"many a night, just at midnight, when all the world slept, it [a groan similar to that uttered by the old man] has WELLED up from my own bosom, deepening, with its dreadful echo, the terrors that distracted me. " Poe

The type of comparison the author uses with the word WELL, is called a ______because it's not direct, but implied.
Anyone have any idea what type of comparison this is? I said he uses the word 'welled' in order to compare the way groan comes out of man to a fountain or even tears. They both well from a compiling of pressure until they finally burst forth into existence.

The type of comparison used by the author with the word "welled" is called a metaphor. A metaphor is a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable, in order to suggest a resemblance. In this case, the author is comparing the way the groan comes out of the man to something welling up, implying that it is similar to a source of pressure building up until it finally bursts forth. This comparison helps create a vivid image and enhances the understanding of the intense and overwhelming emotions experienced by the narrator.

The type of comparison that the author uses with the word "welled" is called a metaphor. A metaphor is a figure of speech in which a word or phrase is used to imply a comparison between two unrelated things, without using the words "like" or "as". In this case, the author is comparing the groan that comes out of the old man to something welling up, similar to a fountain or tears. The comparison emphasizes the intense pressure and buildup of the groan before it finally bursts forth.