nub pa

ནུབ་པ
to subside/ sink/ be lowered/ fall/ falter; isc. to disappear/ fade from view; to be eclipsed [RB]

nub pa, nub pa, nub pa intr. v.; to sink, collapse, decline, decay; disappear, fall gradually, go down, set, subside, vanish, opp. to shar ba [RY]

subside, disappear, set, understate, inhabitant of the west, occidental, go down, sink, collapse, decline [JV]

(tha mi dad pa 1) set, subside, go down; 2) sink [in water]; 3) fade, vanish, decline, disappear; 4) fall gradually; 5) person living in the W, westerner; 6) collapse; 8) decay [IW]