The phrase 'dirty look' refers to a scornful or disapproving facial expression. Its antonyms can be words such as approving, friendly, or welcoming. For instance, a friendly look conveys a sense of warmth and openness, while an approving expression shows satisfaction and agreement. In contrast, a dirty look can be replaced with a neutral or pleasant expression that denotes kindness, empathy, or sympathy. Examples of words that can serve as antonyms for dirty look include smiling, bright-eyed, open, inviting, engaging, attentive, pleasant, or beaming. When interacting with others, it's essential to maintain positivity and avoid giving dirty looks, which can cause tension and misunderstanding.