Synonyms for "wast wise to someone" include "inform," "enlighten," "advise," "educate," "instruct," "hip," and "clue in." These terms all imply a sense of imparting knowledge, typically in order to help someone make better decisions or avoid mistakes. "Wast wise to someone" is often used in a slightly negative way, indicating that the person being informed is naive or ignorant, whereas the synonyms have a more positive connotation of sharing wisdom and insight. Whether you use "wast wise to someone" or one of these other phrases, it's important to approach the situation respectfully and with a desire to genuinely help the person in question.