UNDO Copy link • UNDOPROP., solvere, dissolvere: resolvere: expedire (to disentangle; all, e.g., a knot). To undo the string by which a letter was fastened, epistolam solvere epistolae vincula laxare (Nep., Paus., 4, 1). To recall or reverse what has been done, aliquid infectum reddere; in integrum restituere. [Vid: UNDONE.] To ruin, Vid.