lookout, sentry, watchman; see guard.
"sentinel." YourDictionary, n.d. Web. 14 September 2018. <http://thesaurus.yourdictionary.com/sentinel>.
sentinel. (n.d.). Retrieved September 14th, 2018, from http://thesaurus.yourdictionary.com/sentinel
A person or special body of persons assigned to provide protection or keep watch over, for example:
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