"act of opposing, antagonizing, or obstructing; act of transgressing or violating," 1570s, from Middle French contravention, from Vulgar Latin *contraventionem, noun of action from past-participle stem of Late Latin contravenire (see contravene).
contrariwise
contrary
Contras
contrast
contravene
contravention
contretemps
contribute
contribution
contributor
contrite