Putting kibosh on is an idiomatic expression that means to put a stop to something or to prevent something from happening. However, if we want to express the opposite meaning, we can use antonyms for this phrase such as igniting, encouraging, or promoting. These words convey the opposite meaning of preventing something from happening. Igniting means to start something, encouraging means to stimulate something, and promoting means to advance something. These words suggest an action of initiating or supporting something to happen, which is the direct opposite of putting kibosh on. So, if you want to express the opposite meaning of putting kibosh on, these antonyms can be handy.