Alas is a term often used to express regret or sorrow. It can also be used to convey a sense of disappointment. In the English language, there are several synonyms that have a similar meaning to the term alas. These include words like unfortunately, regrettably, sorrowfully, sadly, and woefully. Each of these words can be used to express a sense of sadness or disappointment over something unfortunate that has occurred. They can be used in a range of contexts, from expressing sympathy over a friend's misfortune to lamenting a lost opportunity. Regardless of the context, these synonyms can help to add depth and nuance to our everyday language and communication.