Dealing a blow is usually associated with causing harm, damage or negative impact to someone or something. The antonyms, therefore, would be words that convey or suggest positive, constructive, or beneficial actions. Potential antonyms for dealing a blow may include: offering a helping hand, providing support, giving an encouraging word, showing kindness, giving a compliment, offering praise, promoting peace, building up, giving a boost, assisting, nurturing, or empowering. It's important to remember that our words and actions can have a powerful impact on others, and choosing to use the right language can help foster positive relationships and outcomes.