Option 1 -> "Ignore" means to disregard, but doesn't capture the active violation aspect of infringement.
Option 2 -> "Contavene" appears to be a misspelling of "contravene," which could work but is less commonly used with "rights."
Option 3 -> "Overturn" means to reverse or abolish, which doesn't fit the context of unlawfully breaching rights.
Option 4 -> "Violate" means to break or fail to respect laws/rights, making it the most appropriate synonym for "infringe."
Hence, Option 4: violate -> "Infringe" specifically means to actively break or encroach upon laws, agreements, or rights. "Violate" is the most direct and commonly used synonym in the context of intellectual property rights infringement, perfectly capturing the illegal breach of competitors' protected rights. -> correct