Sentence:  Communication can often break down if the terminology is too technical, if a speaker uses “<WSD>big words</WSD>” for their own sake and lets the language become overly complex. 
Meaning of the word marked with <WSD> tags:  An erudite word, especially a Latinate or multisyllabic one; a word used by scholars, intellectuals, etc., but that is not commonly known outside of academia.