The word "un-latch" can mainly be defined as the process of releasing or opening something that was previously latched or closed. As such, its antonyms are words that relate to the act of closing, securing, or fastening. Some antonyms for "un-latch" include "secure," "bolt," "lock," "clasp," "shut," "fasten," "seal," "button," "chain," and "zip." These words signify the opposite action of "un-latch." They refer to the process of locking or closing a door, window, or container, rendering it inaccessible or inaccessible for outsiders. Understanding these antonyms is essential when describing the act of "un-latching" something.