I. ˈkän-trə preposition
Etymology: Middle English, from Latin
Date: 15th century
1. : against — used chiefly in the phrase pro and contra
2. : in opposition or contrast to
II. ˈkän-trə, ˈkōn-, -ˌträ noun
Etymology: American Spanish, short for contrarrevolucionario counterrevolutionary
Date: 1981
: a member of a guerrilla group opposed to the Sandinista government in Nicaragua in the 1980s