堆積

1. Origins, structure, and basic meaning

• Structure: 堆積 is read as たいせき and means sedimentation or the accumulation of material such as sand, soil, or dust in layers or piles.
• Basic usage: Use 砂の堆積 for sedimentation of sand and ほこりが堆積する for dust accumulating, showing nominal and verbal use.

2. Common pitfalls and similar expressions

• Difference between 堆積 and 蓄積
  • The former often describes physical material settling in layers or piles, whereas the latter also readily covers abstract accumulation such as knowledge, experience, or data.