כָּשֵׁר (kāšēr) is
a Hebrew verb
meaning be advantageous. It appears
4 times
in 2 books of the Hebrew Bible
(Strong's H3787).
Also rendered
to succeed
Same Hebrew root (TWOT 1052)
Root family 1052: כָשֵׁרkāšēr — be right and proper to (in ’the eyes of, Est 8:5): to prosper (Eccl 11:6). Cf. Akkadian kašāru “succeed”; kišrôn is: skill; success (Eccl 2:21; 4:4); advantage (Eccl 5:10). (Medieval Hebrew košer = “right and proper,” i.e. according to the rules of ritual purity.)