frozen harbor
Archaic term for a harbor that is frozen over, typically in winter. Rarely used in modern Japanese; the concept is more commonly expressed as 凍結した港 or similar phrases.
古い文献には、冬の凍港で船が動けなくなったと記されている。
Old documents record that ships became stuck in the frozen harbor in winter.
ice-free port
Compound of 凍 (freeze) and 港 (harbor). The exact historical origin is uncertain, but it is a straightforward kanji compound.