johtamaton

johtamaton is Finnish, an adjective meaning "without wires" or "non-conducting." It covers two primary senses in technical language: electrical insulation and wireless communication. Etymology: formed from johto, "wire" or "conductor," with the suffix -maton meaning "without."

In electronics and electrical engineering, johtamaton describes materials or devices that do not conduct electric current. Such "johtamaton materiaali" or insulators prevent unintended current flow and are essential for safety and circuit design. Common examples include plastics, rubber, glass, and ceramics. The property is contrasted with "johtava" (conductive).

In communications and information technology, johtamaton refers to systems that transmit information without physical conductors. Wireless technologies such as Wi‑Fi, Bluetooth, cellular networks, radio, and satellite communications are described as johtamaton. The term is often used in both lay and technical language to distinguish from wired connections (USB cables, Ethernet).

Note that in physics or materials science, "johtamaton" can also describe non-conductive substances (dielectrics) used to insulate components or separate circuits. The exact meaning of johtamaton depends on context, ranging from insulating materials in hardware to wireless modes of data transmission in networking and communications. See also insulator, dielectric, wireless.