A primitive root; to shove or displace -- loose.
H2118. zachach
[זָחַח] verb remove, displace (Arabic push, thrust away; compare also Aramaic זוּחַ, , move, move away (intransitive)) —
Niph`al Imperfect הָאֵפוֺד מֵעַל הַחשֶׁן יִזַּח וְלֹא Exodus 28:28 and that the breast-piece be not displaced etc., 39:21 (both P).