The opposite of "more manipulable" is "less manipulable." People or things that are less manipulable are difficult to influence or control. They have a strong sense of self, beliefs, values, and emotions, and are not easily swayed by outside influences. They are independent and self-reliant, making it tough for others to manipulate or control them. Furthermore, they have a clear understanding of their ideals and goals, making them less susceptible to deceitful schemes or dishonest persuasion tactics. In short, less manipulable individuals are resilient and uncompromising, standing firm in their beliefs and principles.