Disputatious

disputatious \ ˌdi-spyü-ˈtā- shəs\ adjective: 1 a. inclined to dispute, b. marked by disputation, 2. provoking debate; controversial

Etymology: Middle English, from Anglo-French desputer, from Latin disputare to discuss, from dis- + putare to think

Working from dispute, it’s easy enough to assume the correct definition of disputatious. Why then do we rarely hear the word in conversation?