1.
icicle
A hanging piece of ice formed when dripping water freezes. Commonly seen hanging from eaves, cliffs, and other overhangs in cold weather.
Pronunciation
The kanji 氷柱 literally means "ice pillar," but the native Japanese reading つらら is an irregular (ateji-style) reading. The word can also be read ひょうちゅう in scientific or formal contexts, where it means "ice pillar" or "ice column" more broadly.
Usage
A seasonal word (季語) associated with winter in haiku. 氷柱 evokes the beauty and severity of winter in Japanese literature and culture.