The phrase "give a black eye" means to embarrass or damage one's reputation. Some antonyms for this phrase could be "commend," "praise," "laud," or "applaud." These words connote appreciation and admiration instead of humiliation or disapproval. Another antonym could be "boost," which means to improve, strengthen or elevate someone's status. Using these antonyms in reference to someone will enhance their character and establish a positive attitude towards them. It is always better to uplift others than to bring them down, highlighting their accomplishments and efforts rather than their shortcomings. Therefore, using these antonyms will ensure a constructive and respectful approach towards individuals.