Also see definition of "Keeper" in Word Study
Keeper
KEEPER; KEEPERS [isbe]
KEEPER; KEEPERS - kep'-er, (mostly from shamar; phulax): The word is used of keepers of sheep, vineyards, doors, prisons (in Gen 39:21 ff, car; compare Acts 5:23), etc. In Eccl 12:3, "The keepers of the house shall tremble," the allusion is to the decay of bodily powers, the "keepers" being specially the arms, which had become feeble through age.
Also see definition of "Keeper" in Word Study