Safety is an essential aspect of life, and when something is not secure, it is considered unsafe. In contrast, the antonyms of unsafe refer to things that are reliable, secure, and protected. Some antonyms for unsafe include secure, dependable, stable, shielded, protected, harmless, and sound. When an environment or situation is secure, it means there are no real or perceived dangers. A dependable or stable place is one that one can trust, and they feel comfortable in it. Being shielded or protected suggests safety from external or internal hazards. The term harmless speaks to lack of potential harm, while sound implies safety, reliability and strength.