After 10 failed login attempts, your Apple Watch will be deactivated.
Step 1. You can use your associated iPhone to unlock your Apple Watch if you remember your passcode.
Step 2. You now need to open the Apple Watch app in you iPhone. And then tapped on Passcode.
Step 3. Choose iPhone to unlock. Connect your Apple Watch to your computer and push the Digital Crown.
Step 4. To unlock your Apple Watch, enter the passcode or use Touch ID on your iPhone
For More Details Click Below