refasten
verbUK /ˌriːˈfɑːsən/
US /ˌriːˈfæsən/
To fasten something again after it has come loose.
She had to refasten her seatbelt after the bumpy landing.
OTHER MEANINGS
2. To reattach something with a clasp, buckle, or similar device.
He refastened the buckle on his backpack.
3. To close something again by securing its fastening.
Please refasten the gate so the dog doesn't get out.
4. To fix or secure something back into place.
The carpenter refastened the loose board to the fence.