creep
– verb
1. to move slowly with the body close to the ground, as a reptile or an insect, or a person on hands and knees.
2. to approach slowly, imperceptibly, or stealthily.
3. to move or advance slowly or gradually.
4. to sneak up behind someone or without someone's knowledge.
5. to enter or become evident inconspicuously, gradually, or insidiously.
6. to move or behave timidly or servilely.
7. to grow along the ground, a wall, etc., as a plant.
8. to advance or develop gradually so as to infringe on or supplant something else.
9. to slip, slide, or shift gradually; become displaced.
10. to creep along or over.
– noun
11. an act or instance of creeping.
12. a boring, disturbingly eccentric, painfully introverted, or obnoxious person.
13. an intelligence or counterintelligence agent; spy.
14. the slack in a trigger mechanism before it releases the firing pin.
15. a sensation of horror, fear, disgust, etc., suggestive of the feeling induced by something crawling over the skin.
- idiom
16. to be frightening or repellent; cause one to experience uneasiness.