我理解"摊破"就是把结论摊出来。你不必猜了。如词谱:

还与韶光共憔悴　不堪看---》 韶光憔悴不堪看

多少泪珠何限恨　倚阑干---〉 泪珠何恨倚栏杆

Thanks so much for your elaboration with above samples - I didn't know what's your questions until now. My understanding was the last three characters was the conclusion: 不堪看 (我理解"摊破"就是把结论摊出来。你不必猜了。如词谱:

菡萏香销翠叶残 西风愁起绿波间 还与韶光共憔悴 不堪看