堆積

• Reading: たいせき
• Romaji: taiseki
• Kanji breakdown: 堆 (tai) — heap, pile; 積 (seki/tsu-) — accumulate, stack
• Pronunciation: /ta.i.se.ki/

Meaning

Accumulation; sedimentation; deposition. The gradual build-up of materials such as sediment, rock fragments, or organic matter over time.

A noun used in geology, earth science, and environmental studies. 堆積 describes both the process and the result of material settling and accumulating, particularly in geological contexts such as 堆積岩 (sedimentary rock) and 堆積層 (sediment layer). It is also used more broadly for any gradual accumulation, such as the build-up of problems or stress.

Examples

1. 長い年月にわたる砂や泥の堆積によって、この広大な平野は形成された。 This vast plain was formed by the accumulation of sand and mud over many long years.
2. 河床への土砂の堆積が続いており、洪水リスクが高まっていると専門家は警告する。 Experts warn that the continued deposition of sediment on the riverbed is increasing the risk of flooding.
3. 研究者は堆積岩の地層を分析し、数千万年前の環境を再現した。 Researchers analysed the strata of sedimentary rock and reconstructed the environment of tens of millions of years ago.

Usage Guide

Context: geology, earth science, environmental science

Tone: academic

Origin & History

Compound of 堆 (heap, pile up) and 積 (accumulate, stack). Both characters convey the idea of things piling up, reinforcing the meaning of gradual build-up over time.

Cultural Context

Era: Modern

Generation: Adults

Social background: Academic