Mightily/ˈmaɪtɪli/ Definition 1 of 2Pro Tip 1/3Physical Effort Use 'mightily' to describe someone putting great physical strength into an action. She pulled at the rope mightily. Pro Tip 2/3Dramatic Effect Use 'mightily' to make actions sound more dramatic or intense in stories. The warriors fought mightily against the invading forces. Pro Tip 3/3Emotional Descriptions Can describe emotional efforts, like trying very hard to overcome difficulties. Despite his fear, he spoke mightily in front of the crowd.