The term "casting aspersions upon" suggests negatively criticizing or defaming someone or something. For instance, one might question the truthfulness of a politician or discredit an argument without any evidence. Antonyms for this phrase could include praising, lauding, or complimenting. Praising someone entails expressing admiration or approval towards their achievements, whereas lauding refers to giving public recognition or applause for someone's success. Complimenting someone involves expressing a sincere and positive statement to make them feel good. These antonyms offer alternatives to "casting aspersions upon," which avoids creating a negative impact and promotes positivity.