controversial/ˌkɒn-trə'vɜː∫əl $ ˌkɑːntrə'vɜːr-/

a. causing a lot of disagreement among people

a. 引起争论的，有争议的：Why is abortion a controversial issue in the United States? 为什么在美国人工流产是个有争议的问题？

构词contro（对立）+ -vers- + -ial →“对立地谈话”即“有争议的”

同根 conversation diverse; universe; university; version