"Sometimes" is an adverb used to indicate that an action or event occurs occasionally, but not all the time. It suggests variability in frequency, meaning that while something may happen at certain moments, it is not a constant occurrence. For example, a person might say, "I sometimes go for a walk," implying that walking is not a daily routine. In everyday language, "sometimes" helps convey uncertainty or variability in experiences. It can apply to various contexts, such as emotions, habits, or events. For instance, someone might feel happy sometimes, indicating that their mood changes rather than being fixed.