spawn

ancestor, antecedent, father, forebear (also forbear), forebearer, forefather, grandfather, parent, primogenitor, progenitor

impede, limit, restrict

clamp down (on), crack down (on), crush, dampen, put down, quash, quell, repress, smother, squash, squelch, stifle, subdue, suppress

arrest, check, control, curb, inhibit, rein (in), restrain, retard

can [slang], kill, snuff (out), still

abolish, demolish, destroy, extinguish, liquidate, quench