Why this word is great
POSTSCRIPTUM — [Noun] A thing that has been written afterwards; something appended in writing. Learned borrowing from Latin postscriptum, from post ("after, behind") + scrīptum ("text, something written"). Unlike an "addendum" (a formal, often necessary addition) or a "footnote" (a scholarly aside tethered to its reference), a postscriptum is the writer’s private sigh—unburdened by structure, slipping in after the farewell. It is the lover’s hesitant "P.S. I miss you," the politician’s hastily appended apology, or the novelist’s afterword—where the real truth, too urgent or too fragile for the body of the text, finally slips free. A postscriptum is the whisper after the speech, the shadow trailing the form.