If you're thinking about family as a group of related people:
* Strangers: This signifies a complete lack of connection or relationship.
* Loneliness: This emphasizes the absence of family support and connection.
* Isolation: This emphasizes the lack of interaction and belonging within a family.
If you're thinking about family as a close-knit group with shared values and support:
* Antagonism: This suggests conflict and opposition, the opposite of unity and shared purpose.
* Disunity: This highlights the absence of shared goals and common ground.
* Indifference: This focuses on the lack of care and concern for each other.
If you're thinking about family as a source of love and support:
* Abuse: This directly contradicts the positive connotations of family.
* Neglect: This represents the absence of care and attention that a family should provide.
* Betrayal: This signifies a breaking of trust and loyalty expected in a family.
Ultimately, the "opposite" of family depends on the specific meaning you're trying to convey.