A British-Israeli linguist, Guy Deutscher, wrote a book a decade or so ago titled The Unfolding Of Language, where he explained this with a made-up Aramaic root, S-N-G, meaning in this example “to snog”. Using the grammar of Aramaic, he derived words that any speaker whom knew this root would understand as meaning things like “one who snogs” and “I was made to snog myself”
It may or may not have been “musnig”, if “Muslim” can be read as “I was made to be at peace with myself”.