shamar (Hebrew #8104)
properly, to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.
KJV usage: beward, be circumspect, take heed (to self), keep(-er, self), mark, look narrowly, observe, preserve, regard, reserve, save (self), sure, (that lay) wait (for), watch(-man).
Pronounce: shaw-mar'
Origin: a primitive root