Definition of "unspring"

unspring

verb
third-person singular simple present unsprings, present participle unspringing, simple past unsprang or unsprung, past participle unsprung
1. (transitive, intransitive) To release or be released by means of a spring.
  Quotations
  There was a click and the unspringing of a latch.
  2010, Elizabeth Mirabel Sain, Gift with Purchase
2. (transitive) To undo the springing of (a mechanism).