"लेकिन" is a Hindi conjunction that translates to "but" in English. It is used to introduce a contrast or exception in a sentence. For example, in the sentence "मैं स्कूल जा रहा हूँ, लेकिन बारिश हो रही है" (I am going to school, but it is raining), "लेकिन" highlights the contradiction between going to school and the rain. This word is commonly used in everyday conversations and writing to express differing ideas or to present an alternative perspective. It helps in creating a more nuanced understanding of a situation, allowing speakers to convey complexity in their thoughts and arguments.