It is if you're writing vimscript.

People downvoted you because instead of polluting the discussion, you could have looked this up yourself.

The answer is yes, both words are related to idios, "own", "self", "private".

Please don't comment about the voting on comments. It never does any good, and it makes boring reading.

https://news.ycombinator.com/newsguidelines.html

lame