godan verb (-mu), intransitive verb
abandon oneself to grief; weep bitterly; be overcome with tears
Describes a state of being so overwhelmed by sadness that one cries uncontrollably and sinks into despair. Often used in literary or emotional contexts.
彼女は悲しみに泣き沈んだ。
She abandoned herself to grief and wept.
その知らせを聞いて、彼はただ泣き沈
Upon hearing the news, he could do nothing but weep bitterly.