set-apart

select something or someone for a specific purpose

• “The teacher assigned him to lead his classmates in the exercise”

set apart from others

• “The dentist sequesters the tooth he is working on”

being or feeling set or kept apart from others

• “she felt detached from the group”
• “could not remain the isolated figure he had been” Sherwood Anderson
• “thought of herself as alone and separated from the others”
• “had a set-apart feeling”