To falsely hide one's opinions or feelings.
To disguise or conceal something.
To feign.
To deliberately ignore something; to pretend not to notice.
To inform on, especially in betrayal of others.
To contact or cooperate with the police for any reason.
A ball used in the sport of Quidditch.
A thief.
An informer, one who betrays his group.
A nose.
A tiny morsel.