freeze-up

Etymology
.

Noun

 * 1) The blocking of pipes due to freezing.
 * 2) A period of extremely cold, freezing weather.
 * 3)  The start of the time when surface waters are frozen over.
 * 1)  The start of the time when surface waters are frozen over.

Translations

 * French:
 * Ojibwe: migiskāw