Being indecisive is a common struggle that many people face. However, there are ways to combat indecisiveness and become more decisive. One antonym for being indecisive is being decisive, which involves making a decision confidently and without hesitation. Another antonym is being resolute, which means being firm in one's decisions and not changing one's mind easily. Additionally, being determined is an antonym for being indecisive, as it involves actively pursuing a goal or decision with a strong sense of purpose. By being decisive, resolute, and determined, one can overcome indecisiveness and achieve success in their personal and professional lives.