This is the 6314th most frequent Chinese word.
惨痛
Deeply painful or tragic.
In this sentence, '惨痛的教训' illustrates the profound and painful impact of a lesson learned from negative experiences.
那次事故带来了惨痛的教训。
That accident brought about a painful lesson.
Here, '惨痛的过去' refers to deeply sorrowful and regrettable memories stemming from past events.
她回忆起那段惨痛的过去,泪水夺眶而出。
She recalled that painful past, and tears sprang from her eyes.
In this usage, '惨痛的失败' conveys a significant and distressing sense of defeat that acts as a strong motivator for change.