The word "失落" is formed by combining two characters: "失", which conveys the idea of losing or missing something, and "落", which implies falling or declining. Together, they create a composite meaning where the sense of loss from "失" is enhanced by the downward or diminishing imagery of "落", evoking a state of emotional letdown, disheartenment, or emptiness, as if one has fallen into a void after a loss. This formation relies on the conceptual blending of both characters to express a nuanced feeling of dejection.