jargonise

verb - to jargonise, the act of taking a simple easily understood word and changing it to a different word which is harder to understand by most as it is from a semantic field understood only by those with intense knowledge of that particular field. Can also be the act of taking a simple easily understood text, and carrying through a similar action as above except to the whole text. past tense, jargonised

I was able to understand that word, because it was just the word, 'word', but now someones jargonised and its now 'lexeme' and I can't understand it.