1. the state or quality of being infantile; childish or immature behavior
Usage: formal

Examples

• His infantility was evident in his refusal to take responsibility for his actions.
• The committee was frustrated by the infantility of the debate.
• She grew tired of his emotional infantility and constant need for attention.
• The novel explores themes of arrested development and psychological infantility.
• His infantility prevented him from forming mature relationships.
• The therapist helped her recognize patterns of infantility in her behavior.