Trying to understand each of the component words of the phrase 辛苦
辛 xin means bitter busuo
苦苦 seems to be the symbol you see at weddings (?)
?
What are the full etymological meanings of each of the words, and why does combining them together mean 辛苦? (Why isn't bushou a tag)
edit: i am curious more about why combining the two characters together mean what they mean?