di-min'-ish: the Revised Version (British and American) has retained nearly all passages of the King James Version where "to diminish" is used. Some of these uses have become obsolete: De 4:2, "neither shall ye diminish from it." "Diminish" generally means "to reduce," "to lessen." In this sense it is employed in Eze 5:11 from the Hebrew gara`, literally, "to shear." The picture of shearing the beard, expressing degradation and loss of manhood, may underlie this passage.
The International Standard Bible Encyclopedia
Diminish
The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.