Antonyms for "indisposed to" include willing, disposed, inclined, eager, enthusiastic, and open-minded. When someone is willing to do something, they are ready and prepared to take action. Similarly, when someone is disposed to something, they are inclined to favor it or are open to it. Being eager implies a strong desire or enthusiasm to do something, while being enthusiastic is similar but with a more positive connotation. Finally, being open-minded means being receptive to new ideas or experiences. All these antonyms suggest a positive mindset of being ready, inclined, and enthusiastic about something, in contrast to being unwilling, disinterested, or hesitant, as implied by "indisposed to.