The word "certainly" functions in literature both as an instrument of emphasis and a marker of assuredness, yet its usage varies widely depending on tone and context. In declarative statements, it reinforces certainty and conviction, as in asserting truths about nature or society [1], [2]. In dialogues, it often punctuates affirmations or denials, adding a layer of immediacy or sincerity to a character’s voice [3], [4], [5]. At times, it introduces a contrast or a subtle nuance, delineating when one is committed to an opinion or when caution is warranted [6], [7]. Regardless of the setting, whether in philosophical discourses [8] or in everyday exchanges [9], "certainly" consistently serves as a linguistic tool to project clarity and emphasis.