The antonyms for the word "re-instating" are ceasing, discontinuing, halting, stopping, terminating, and suspending. Ceasing means to come to an end or to stop doing something. Discontinuing means to stop or interrupt the progress of something. Halting means to bring to a stop or to make something come to an end. Stopping means to come to a standstill or to prevent something from proceeding. Terminating means to put an end to or to discontinue something finally. Suspending means to temporarily stop or to hold in abeyance. These words have opposite meanings to re-instating, which means to restore something to its former state or position.