堤 means “embankment, levee”

てい · tei

Also: dike, bank

Kun'yomi (Japanese reading)
つつみ
On'yomi (Chinese reading)
テイ

JLPT N1 · Taught in secondary school · 12 strokes

The story

Earth (土) beside 是, straight and right: soil packed firm to hold a river back. 堤防 is a levee, like the grassy banks lined with cherry trees along many Japanese rivers, and 防波堤 is a breakwater facing the sea.

Used in 堤防 (teibou, levee/embankment), 防波堤 (bouhatei, breakwater), and 堤 (tsutsumi, bank/dike)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.