שָׁמַר

From LSJ

ὣς ὁ μὲν ἔνθ' ἀπόλωλεν, ἐπεὶ πίεν ἁλμυρὸν ὕδωρ → so there he perished, when he had drunk the salt water

Source

English (Strong)

a primitive root; properly, to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.: 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).