Can you please reopen: What is the origin of "ex"?
The reason for closing it was the following:
"Please include the research you've done, or consider if your question suits our English Language Learners site better. Questions that can be answered using commonly-available references are off-topic."
The research has now been included. Moreover, the OP didn't only ask about the origin of ex, but he also wanted to know: Does ex have a full form? As a result, the answer is not easily ‘Googlable’.
The community should reopen the question because, in my opinion, it is a good and valid question.
Note: I don't favor questions without any research at all, but questions should be saved if they have good answers. For example, I wouldn't reopen a question that asks "What is the etymology of book?" and if lacked any details in the question body.
OK maybe I'm just being too nice in the spirit of the holidays :)
