A primitive root; to become thin, i.e. (figuratively) be impoverished -- be (waxen) poor(-er).
H4134. muk
[מוּךְ] verb be low, depressed, grow poor (Late Hebrew id., Niph`al; Aramaic מוּךְ, sink or bend down; compare מָכַח, Syriac , be brought low, humble); —
Qal Perfect consecutive וּמָח Leviticus 27:8 (P); Imperfect יָמוּח 25:25, 35, 39 (all H); Participle מָח 25:47 (P): all of impoverished Israelites.