If you tie a cord, then it shows how much the passion and work you put into something. If you untie the cord, then you may have troubles or will get released from something stressful. If you broke the cord, you will lose a relationships that youve been working on.
Dream dictionary: Cord(rope) dream meanings
Dreaming of trying to tie an energetic horse with a rope or a cord indicates that you can handle important issues, even when it involves feelings. Dreaming of people or important objects tied with a cord, wire or string indicates that the affairs that you have under your control may take some time to be successfully completed.