The phrase "be mean with" often implies someone being stingy or withholding something. Antonyms for this phrase could include "be generous," "be giving," "be charitable," "be benevolent," or "be magnanimous." These words suggest a willingness to share resources and be kind to others. Additionally, antonyms for "be mean with" could include phrases like "be open-handed," "be liberal," or "be free-hearted." Using these words in conversation can convey a positive attitude towards others and demonstrate a willingness to help those in need. In any case, being generous and kind is always seen as commendable and appreciable.