霜柱

1. Origins, structure, and basic meaning

• Structure: 霜柱 (しもばしら) combines frost 霜 and pillar 柱 for column-like ice crystals that rise from soil.
• Basic usage: It refers to the winter ground phenomenon seen in fields and crunched underfoot.

2. Common pitfalls and similar expressions

• Ice columns rather than surface frost
  • 霜柱 forms upward from moist soil, so it is more specific than a thin coating of frost on an exposed surface.