depends, rests, predicated, relies, dependent, revolves, focuses, premised, involves, complicates, revolve around, stems, trumps, hinders, necessitates, determines, crucial, bolsters, awaits, basing, precludes, determinant, builds, underpins, eludes, centering, requires, linchpin, entails, reliant, debatable, jeopardizes, sine qua non, cusp, defers, hangs, stymies, determiner, undermines, crux, underlies, comes, pertains, prerequisite, relates, latch, looms, sealed, affect, impedes, focusses, lynchpin, predetermine, negates, mirrors, verge, overshadows, clouding, scuppers, spurs, key, ponders, nullifies, impresses, presupposes, boosts, imperils, lid, regardless, fulcrum, foretells, alters, emphasizes, baffles, dictates, undoes, scuttles, cinches, diminishes, threatens, goes, erodes, improves, reflects, means, thwarts, begets, impinges, cements, taints, augurs, presages, lacks, varies, falters, roils, wheels, deliberates, keystone, dampens, examines, survives, hinge, bolts, grills, hangers, hoops, lock, anchors, bellows, casters, fastenings, rivets, brackets, grate, handles, hoop, pegs, pivots, bolt, braces, grille

accordion door, clamshell, folding door, grapple, rusted, unhinge, wrench