lack of courage to face danger, difficulty, opposition, pain, etc.
What kind of person can't stand up and explain their actions, even when they know they're in the wrong? What kind of person can't face the persons they've wronged, all the while knowing it will come up some time? What kind of person hides behinds others words and waits, crouched in the corner until the inevitable shit-storm flies through.
A spineless, character-devoid, soulless coward. Someone that hides behind this pointless façade of righteousness and kindness, pretending all is well and then turning their back without a single word. Watching from a distance as their actions leave smoking craters in the lives they once knew, and then having the raw-red cheek to not even mention the consequent destruction. And yet the coward does not care, or think or feel. It simply continues with the new path it has paved for itself, leaving others to deal with the damage as they go on happily toward a shameless fate.
But when the fate catches up with them, once the shame and guilt and realisation of what they have become finally punches through the aura of arrogance surrounding them, then the coward will know. Then the coward will know what they've done, but it'll all be too late. The cowardice has consumed. And it ends. With numbness. With neglectfulness. With nothingness.