Putting sleep is a term often used to describe the process of inducing someone to sleep. However, there are several antonyms for "putting sleep." One of the examples is "waking up." In contrast to putting someone to sleep, the term waking up implies that a person is becoming alert, aware, and fully conscious. Another opposite for putting sleep is "keeping awake," a phrase used to describe the act of preventing or delaying sleep. This is often done to ensure that a person remains alert, especially in situations that require vigilance, such as driving or operating machinery. Other antonyms for putting sleep include "stimulating," "exciting," and "invigorating.