The term "more extrusive" implies increased tendency towards outwardly visible behavior or action. Its antonyms, therefore, would be words that denote an opposite characteristic or disposition. One such antonym is "introverted", which refers to a tendency towards inwardly-focused thoughts, feelings, and behaviors. Another antonym would be "reserved", which denotes a quieter, more restrained personality that is less prone to outward displays of emotion or behavior. Thirdly, "reclusive" is an antonym for "more extrusive", describing someone who is highly withdrawn and avoids social interaction. Lastly, "modest" is an antonym in that it denotes a person who is humble and not given to showing off or seeking attention.