Can someone explain why forlade is used instead of efterlade here
Sørgeligt, trist og træls er synonymer.
It's a bad idea to learn the word 'træls' as a foreigner, because only like half of the population use that word. Some don't even understand it.
Plus, træls has a connotation of being something irritating that happened, not something you'd cry over or be sad about but cuss at.