The word "might" is a modal verb used to express possibility or uncertainty. It indicates that something could happen or be true, but it is not guaranteed. For example, saying "It might rain tomorrow" suggests that there is a chance of rain, but it is not certain. In addition to expressing possibility, "might" can also be used to make polite suggestions or requests. For instance, saying "You might want to try that restaurant" offers a recommendation without being forceful. Overall, "might" helps convey varying degrees of likelihood in communication.