Probably from H3772 in the sense of executioner; a Kerethite or lifeguardsman (compare H3876), (only collectively in the singular as plural)
KJV Usage: Cherethims, Cherethites.
Brown-Driver-Briggs' Hebrew Definitions
Cherethites = "executioners" 1. a group of foreign mercenary soldiers serving as a bodyguard for king David; also executioners 2. either Cretans or proto-Philistines (in general)
Origin: probably from H3772 in the sense of executioner
Parts of Speech: Adjective