close up, surround, wall in, wall out; see enclose 1.
"wall-up." YourDictionary, n.d. Web. 17 January 2019. <https://thesaurus.yourdictionary.com/wall-up>.
wall-up. (n.d.). Retrieved January 17th, 2019, from https://thesaurus.yourdictionary.com/wall-up
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