As a noun, "role" refers to the part played by a person or thing in a particular situation or activity. For example:
* "He played the role of the villain in the movie."
* "The role of the media in shaping public opinion is significant."
As a verb, "role" means to play a particular part in a play or film, or to perform a particular function. For example:
* "She was roled as the lead actress in the play."
* "The machines are roled to perform specific tasks."
The part of speech will depend on the context of the sentence.