Give slip is a phrase that means to escape or evade somebody. The most common antonyms of this phrase are to capture or apprehend. Other antonyms for give slip include the verbs catch, seize, arrest, capture, and hold. For example, if someone tries to give slip from the authorities, the police could capture them before they are successful. Additionally, the words retain or hold onto can also be seen as an antonym of give slip, as they imply keeping something or someone in one's possession. Overall, while give slip implies an act of evading, its antonyms suggest actions of capturing or holding.