潜 means “dive, submerge, lurk”

もぐる · moguru

Also: conceal, hide, lower (voice)

Kun'yomi (Japanese reading)
ひそむ, もぐる, かくれる, くぐる, ひそめる
On'yomi (Chinese reading)
セン

JLPT N1 · Taught in secondary school · 15 strokes

The story

Water (氵) and 替, two men (夫夫) over a sun (日): picture divers taking turns slipping under the surface. 潜る is to dive, a 潜水艦 is a submarine, 潜む is to lurk unseen, and 潜在 is latent, still hidden below.

Used in 潜る (moguru, to dive), 潜水艦 (sensuikan, submarine), and 潜在 (senzai, latent/potential)

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