The term “fetter” has been used in literature in a variety of both literal and figurative senses. In mythological and epic contexts—such as in The Younger Edda—it often denotes a physical chain or binding, as seen in accounts of the Fenris-wolf’s restraints ([1], [2], [3], [4], [5], [6], [7]). In other works, however, authors employ “fetter” as a metaphor for constraints that limit human freedom, whether they be the “odious fetter” of study in Shelley's narrative ([8], [9]), the binding nature of relationships as alluded to by Maupassant ([10], [11]), or even the abstract social or ideological bonds critiqued by figures like Nietzsche ([12], [13]). Additionally, “Fetter Lane” appears in several texts as a locational marker—illustrating how the term has branched into both a physical place in London and a broader symbol of confinement ([14], [15], [16], [17], [18]). In these diverse usages across historical, mythological, and social themes, “fetter” vividly captures the dual essence of constraint as both an external imposition and an internal limitation.