The antonyms for the phrase "gave slip" would include actions like catching, seizing, or apprehending. When someone gives slip, they elude or avoid capture, so the opposite action would be to successfully prevent their escape. Other antonyms could include sticking or holding fast, as these actions inhibit movement or prevent someone from slipping away. Additionally, obstructing or blocking could serve as antonyms, as they limit or impede progress. Ultimately, the antonyms for "gave slip" are actions that halt or prevent movement and ensure that someone doesn't get away.