The correct spelling of the word "grated linn" is "grated lagan." The word "lagan" refers to debris or goods that have been lost at sea and washed up on shore. The spelling of "lagan" is pronounced as /ˈleɪɡən/ with the stress on the first syllable. The spelling and pronunciation of this word can be confusing due to its similarity to other words like "logan" and "lagoon." Therefore, it is important to pay close attention to the context in which the word is used to avoid any confusion.