The opposite of extrovertida in Spanish is introvertida. An extrovertida is someone who is outgoing and enjoys being around people, while an introvertida is someone who is more reserved and prefers solitude or small groups.
For example, if someone is described as extrovertida, it means they are very sociable and enjoy interacting with others. On the other hand, if someone is described as introvertida, it means they are more inward-focused and may feel more comfortable in quieter, less social environments.