U1N1D2E1R1T1H4R1U1S1T1I1N1G2
19 points
UNDERTHRUSTING is validvalid
UNDERTHRUST, [v]
UNDERTHRUST, to insert (a faulted rock mass) into position under a passive rock mass [v]
UNDERTHRUST, [v]
UNDERTHRUST, to insert (a faulted rock mass) into position under a passive rock mass [v]