| Subject | English | Polish |
| med. | magnetic resonance unsafe | rezonans magnetyczny – produkt niebezpieczny |
| comp., MS | unsafe character | niepewny znak (A character in a URL that may be altered during transport across the Internet) |
| comp., MS | unsafe code | niebezpieczny kod (Code that is executed directly by the operating system, outside the .NET Framework common language runtime. Unmanaged code must provide its own memory management, type checking, and security support, unlike managed code, which receives these services from the common language runtime) |