堆たい積せき

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Common wordJLPTN1Freq.FrequencyTop 50,000

堆積する · noun or participle which takes 'suru'

Meanings

General term for things piling up or being piled up, both physically and abstractly. Can be used transitively or intransitively.

Geological term for the deposition and accumulation of sediment, often used in earth science contexts.

〈物もの〉が堆たい積せきするfor material to accumulate or pile up
川かわ底ぞこに砂すなや泥どろが堆たい積せきしている。
Sand and mud have accumulated on the riverbed.
〈物もの〉を堆たい積せきさせるto deposit or cause something to accumulate
川かわが土ど砂しゃを河か口こうに堆たい積せきさせる。
The river deposits sediment at its mouth.
〈事こと〉が堆たい積せきするfor troubles or stress to build up (used metaphorically)
仕し事ごとのストレスが堆たい積せきして、体たい調ちょうを崩くずした。
Work stress piled up and I became ill.

蓄ちく積せきN1sense 1
蓄積 emphasizes deliberately storing something up over time for later use, whereas 堆積 emphasizes physical or natural piling up without necessarily any intent.
沈ちん殿でんN1sense 2
沈殿 refers narrowly to particles settling out of a liquid, while 堆積 covers the broader geological process of sediment being deposited and building up.
集しゅう積せき sense 1
集積 focuses on gathering or concentrating things (e.g. data, industries) into one place, while 堆積 focuses on physical material literally piling up.
降ふり積つもるN1
堆積する is a formal, scientific term for sediment or material accumulating, whereas 降り積もる is an everyday word specifically for snow or leaves falling and piling up.
山やま積づみN1
堆積 is a more technical/scientific term for accumulation (e.g. of sediment or data), while 山積み is the everyday word for a pile, especially of tasks or problems.

侵しん食しょく sense 2
侵食 is erosion, the wearing away of land by water or wind, the geological opposite of 堆積, the depositing and buildup of sediment.
浸しん食しょく
堆積 means sediment building up and accumulating, the opposite geological process to 浸食, which describes material being worn away and carried off.

堆たい肥ひ
堆肥 shares the kanji 堆 with 堆積 but means compost, decomposed organic fertilizer, not the general process of piling up or accumulation.

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Compound of 堆 (pile up, heap) and 積 (accumulate, stack). The kanji combination directly conveys the meaning of accumulation.