מַטָּרָה (maṭṭārâ) is
a Hebrew noun
meaning guard. It appears
16 times
in 5 books of the Hebrew Bible
(Strong's H4307).
Also rendered
(Gate of the) Guard
Same Hebrew root (TWOT 1356a)
Root family 1356: נָטַרnāṭar — keep, keep guard, reserve, maintain. (RSV has “be angry” in Jer 3:5, 12 and “keep his anger” in Ps 103:9; ASV uses “retain” in Jer 3:5.)