The term "self-contained" is used to describe something that is complete and independent, having all the necessary components within itself. The antonym for self-contained can be "incomplete," "dependent," or "unprepared." "Incomplete" suggests that something is lacking in vital parts, therefore not being self-sufficient. "Dependent" implies the need for assistance, while "unprepared" signifies a lack of readiness. A self-contained person is often seen as self-sufficient, independent, and capable, while someone who is not self-contained may be considered needy or insecure. It is essential to understand the antonyms of a word in order to gain a better understanding of its context and meaning.