sentinel:1

noun
sen*ti*nel \ ˈsent-nəl \ ˈsen-tə-nəl \
1579
  • sentry

sentinel:2

verb
sentinel \
1593{ds||1||}
  • to watch over as a sentinel
  • to furnish with a sentinel
  • to post as sentinel

stand sentinel

idiom
stand sentinel \
  • to stand in a row like soldiers
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