verb
skulk
SKULK/skʌlk/
To move or hide secretly to avoid being noticed.
The woman skulks along the hidden side of the wall.

Etymology
Middle English skulken described furtive movement or retreat into a secure hiding place. Keeping out of sight connects the word’s two uses: moving secretly and remaining concealed.
More examples
- He skulked along the alley to avoid the guards.
- The cat was skulking beneath the bushes.
- She noticed someone skulking near the back entrance.
Forms
skulk · skulks · skulked · skulking