Verb: To move slowly and quietly, often in a stealthy or secret way.
* Example: "The thief crept through the shadows."
Noun: A person who creeps, especially one who is considered unpleasant or frightening.
* Example: "He gave me the creeps."
Adjective: (Informal) Describing something unpleasant or frightening.
* Example: "The movie was creepily suspenseful."
It's important to look at the context of the sentence to determine the part of speech.