מִשְׁמָר

From LSJ

χελῶναι μακάριαι τοῦ δέρματος → you tortoises are fortunate in your skin, you blessed turtles with your shell

Source

English (Strong)

from שָׁמַר; a guard (the man, the post or the prison); a deposit (fig.); also (as observed) a usage (abstr.), or an example (concr.): diligence, guard, office, prison, ward, watch.