indissolubleadjective · Level 3 SAT1(of a substance) incapable of being dissolvedThey believed their partnership was indissoluble, bound by decades of shared sacrifice and mutual trust.ModuleLevel 3RegisteracademicCollectionCollection 054SAT Complete planAlso in Collection 054consultatory, baneful, detestable, dumbfounded, heinousness, stupefied, tatterdemalion, excruciating and 1 more