מִישׁוֹר (mîšôr) is
a Hebrew noun
meaning level place. It appears
23 times
in 9 books of the Hebrew Bible
(Strong's H4334).
Also rendered
plain
Same Hebrew root (TWOT 930f)
Root family 930: יָשַׁרyāšar — be level, straight, (up) right, just, lawful. (ASV, RSV, neb similar except that they vary translations with “honest,” “righteous.”)