From a form of G3485 and κορέω koreō (to sweep); a temple {servant} that {is} (by implication) a votary: - worshipper.
Verse
Matrix
Rev 2:23And I will kill her children with death; and all the churches shall know that I am he which searcheth the reinsG3510 and hearts: and I will give unto every one of you according to your works.