堤防|ていぼうteibou[0]heiban (flat)

1. nounbank; weir; embankment; levee
   子供こどもたちは堤防ていぼうをすべりおりた。↗

   The children slid down the bank.

• Synonym堤つつみWrittenWord for a bank or embankment, mostly seen in writing, as in 「川の堤」; 「堤防」 is the formal engineering term.
• Synonym土手どてNeutralColloquial word for an earthen bank along a river, as in 「土手を散歩する」; has a homely, everyday feel.
• Related堰せきNeutralA weir or barrier built to hold back water, as in 「堰を切る」; the emphasis is on blocking and regulating the flow.
• Related防波堤ぼうはていNeutralA breakwater built at a harbor to block waves from the open sea; not used for rivers.
• RelatedダムNeutralLoanword for a dam that holds back water or sediment, e.g. a reservoir dam or a 「砂防ダム」; typically built across a river valley.
• Related築堤ちくていWrittenRefers to building an embankment, or to the finished embankment; an engineering term leaning to written usage.
• Related堰堤えんていWrittenTechnical, written term for a weir built across a river or valley, as in 「砂防堰堤」.

Use 「堤防」 for a formal flood-control embankment, as in 「堤防が決壊する」. For an earthen riverside bank say 「土手」 colloquially or 「堤」 in writing; for a water-blocking weir 「堰」; for a harbor breakwater 「防波堤」; for a dam holding water or sediment 「ダム」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 洪水こうずいなどの水害すいがいを防止ぼうしし、土地とちを保護ほごするために、河岸かしや海岸かいがんに土つちやコンクリートで高たかく築きずいた構築こうちく物ぶつ。