In literature, "esp." functions as a concise marker to draw attention to a particular aspect or subgroup within a broader category. It is often inserted to signal that what follows merits special consideration, such as a specific function or type of work ([1], [2]). At times, the abbreviation refines a definition or clarifies a nuance—for instance, noting a kind of bad art or a particular variant of a beverage ([3], [4]). In other contexts, it helps demarcate subsets within classifications, whether in discussions of species, battle-work, or even in invoking a metaphorical spirit ([5], [6], [7]). This economical notation thus enables both writers and lexicographers to rapidly pinpoint what is especially salient in their discourse.