Which of the following words conveys a sense of bitter humor?

The word that conveys a sense of bitter humor is "wry." This term is often used to describe a form of humor that is dry, sarcastic, or subtly mocking, and it typically carries an undertone of irony or cynicism. Wry humor often highlights the absurdities or incongruities of a situation, allowing for a more complex emotional response that includes both amusement and a hint of bitterness or poignancy. Its connotation of having a twist or unexpected angle adds richness to the description of humor that is not entirely lighthearted but rather reflects a deeper or more reflective view of circumstances.

The other words do not capture this specific blend of humor. "Residual" refers to something remaining or leftover, making it unrelated to the concept of humor. "Aesthetic" pertains to beauty or artistic enjoyment, focusing on visual appeal rather than humor. "Blueprint" typically refers to a detailed plan or design, which is also unrelated to the theme of humor. Thus, "wry" stands out as the sole option that embodies the notion of bitter humor.