Watered-down refers to something that has been diluted or weakened. Its antonyms, on the other hand, are words that convey strength, potency, and intensity. One such antonym is "concentrated," which means to increase the strength or intensity of something while reducing its volume. Another antonym is "undiluted," which suggests purity and the absence of weakening substances. "Full-strength" and "powerful" are also antonyms that signify something that is robust, strong, and impactful. Furthermore, "strong" and "potent" also serve as antonyms for watered-down, indicating a level of concentration and effectiveness that is not diminished. One should always strive for full-strength and powerful decision making, while avoiding watered-down ones.