godan verb (-ku), intransitive verb
freeze; become frozen
Intransitive verb describing something becoming frozen solid, often with a nuance of intense cold or stillness. Used for water, ground, or metaphorically for feelings.
湖の表面が凍てついた。
The surface of the lake froze over.
寒さで水道管が凍てついてしまった。
The water pipes froze due to the cold.