immure /im-ūrˈ/

1. To enclose as if within walls, to wall in
2. To shut up
3. To imprison
4. To confine

An enclosing wall

• greyings
• greyish
• grey knight
• grey knights
• greylag
• greylag geese
• greylag goose
• greylags
• grey literature
• greyly
• grey mare
• grey market
• grey markets
• grey matter
• grey mullet
• greyness
• greynesses
• grey-out
• grey-outs
• grey owl
• grey owls
• grey parrot
• grey parrots
• greys
• greyscale