Antonyms for the word "make vulnerable" include "protect," "fortify," "shelter," "defend," and "safeguard." These words imply the act of keeping someone or something safe from harm or danger, and strengthening their defenses against potential threats. Protecting or fortifying oneself against vulnerability can involve taking preventive measures, such as installing security systems, seeking support from loved ones or professionals, or practicing self-care. It also requires recognizing and avoiding situations where vulnerability can arise or be exploited. By choosing to protect and defend ourselves or others, we can increase our resilience, confidence, and sense of security in the world.