The word "clean" refers to a state of being free from dirt, stains, or impurities. It can describe not only physical cleanliness, such as having a tidy room or washed clothes, but also metaphorical cleanliness, such as being morally pure or unblemished in one's actions. A clean environment is often associated with health and hygiene, while a clean reputation implies honesty and integrity.
The word "clean" originates from the Old English "clæne", which means clear or bright. This word has cognates in other Germanic languages and is related to the Proto-Germanic "*klaina-", meaning unblemished or clear.