Mahican is an extinct language, meaning it is no longer spoken by any living people. However, there is some linguistic information available about the language, including a dictionary compiled by the missionary John Campanius Holm in the 17th century.
Unfortunately, the word for "eat" in Mahican is not recorded in available resources. It's possible the word is lost, or it might be found in yet undiscovered historical documents.
If you're interested in learning more about Mahican language and culture, you can consult resources like the American Indian Languages Resource Center or the Smithsonian National Museum of the American Indian.