I just saw the word "compersion" for the first time, and love it:
A feeling of joy when a loved one invests in and takes pleasure from
another romantic or sexual relationship.
Is there a word that means the same thing, but not romantic/sexual? For example, when my best friend has a big win at his job, he's really happy, and I'm super happy for him too. What is the word to express that?
(Interestingly, I think the word I'm seeking is sort of the tangential opposite of schadenfreude, right?)
Best Answer
If you are OK with Wiktionary as a source then compersion does have the meaning you are looking for.
There are a number of definitions in Wikipedia within the topic of Polyamory and therefore are predisposed to be defined in terms of sexual joy. http://en.wikipedia.org/wiki/Polyamory#Compersion
The discussion regarding that page at http://en.wikipedia.org/wiki/Talk%3ACompersion#Etymology.3F puts forward an etymology of the word offering
see http://en.wikipedia.org/wiki/Kerista for the Keristans (who also claim polyfidelity and polyintimacy as words of their own coining - but note that these are based on Greek and Latin roots not a Ouija board)
As noted in a comment, there's no mention of it in the OED but there is (the very obsolete - 1500's) conperseyner and compercioner which are variants of comparcioner which has the definition of
I'm not saying that is the origin of compersion but it's not too hard to extend that to simply sharing with another to cover the emotion of joy without the need for the joy to come from sexual activities.
Wiktionary contributors, "compersion," Wiktionary, The Free Dictionary, http://en.wiktionary.org/w/index.php?title=compersion&oldid=31307300 (accessed January 16, 2015).