What is the meaning of incorrigible?

The term "incorrigible" refers to someone or something that cannot be reformed or improved, typically because they are resistant to change or correction. This word often describes a person with behavior that is considered bad or problematic but is seen as unchangeable. Therefore, the correct choice effectively captures the essence of the word, highlighting its implication of a deep-rooted condition that does not yield to attempts at reform.

The other options, while related to change and improvement, do not accurately convey the finality and resistance inherent in the meaning of "incorrigible." For instance, describing something as "capable of improvement" or "open to change" suggests a potential for positive development, which is the opposite of being incorrigible. Similarly, being "flexible and adaptable" implies a willingness or ability to adjust, again contrasting sharply with the idea of something being incorrigible. Thus, option B is the only choice that aligns perfectly with the true meaning of the term.