going under(n = noun.event) foundering - (of a ship) sinking;
is a kind of sinking

bob under, buckle under, coming and going, contract under seal, down under, easy going, fall under, get going, get under one's skin, go under, going, going ashore, going away, going on, going strong, going to jerusalem, hot under the collar, keep going, know what's going on, knuckle under, labor under, lying under oath, pheasant under glass, put under, snow under, sweep under the rug, under, under arms, under attack, under consideration, under construction, under control, under fire, under it, under no circumstances, under that, under the circumstances, under the impression, under the influence, under the sun, under the weather, under way, under wraps, water under the bridge