What part of speech is the word laid?

The word "laid" can be two different parts of speech, depending on the context:

* Verb (past participle of "lay"): This is the most common usage. It describes a completed action, such as "He laid the book on the table."

* Adjective: This is less common, and it describes something that is flat or arranged in a particular way, such as "a laid-back attitude" or "a laid table."

To determine which part of speech "laid" is, you need to consider the sentence it's used in.