noun which may take the genitive case particle 'no', noun
ice-free; non-freezing; anti-freeze
Describes liquids, ports, or equipment that do not freeze or are protected against freezing. Often used in compound terms like 不凍液 (antifreeze liquid) or 不凍港 (ice-free port).
I put antifreeze into the car's radiator.
This port is known as an ice-free port even in winter.
antifreeze; antifreezing solution
antifreeze; antifreezing agent
freeze protection valve
ice-free sea
antifreeze protein
Compound of 不 (non-) and 凍 (freeze). The exact historical derivation is uncertain, but the meaning is transparent from the kanji.