Seizings are defined as a type of rope or cord used to bind, fasten, or secure something in place. However, when it comes to antonyms for this word, there are several options to consider. One possible antonym for seizings could be loosenings, as this would suggest the opposite action of securing or fastening something. Alternatively, the term untying could also be used as an antonym, specifically when referring to the act of unfastening a knot or securing mechanism. Finally, unbinding could also be considered as an antonym, as it suggests the process of releasing or freeing something from a restrictive hold.