מֵישָׁר (mêšār) is
a Hebrew noun
meaning evenness. It appears
19 times
in 6 books of the Hebrew Bible
(Strong's H4339).
Also rendered
uprightness
Same Hebrew root (TWOT 930e)
Root family 930: יָשַׁרyāšar — be level, straight, (up) right, just, lawful. (ASV, RSV, neb similar except that they vary translations with “honest,” “righteous.”)