TSUMUGU · B1 (est.) · 字
灘
灘 ＝ 氵 ＋ 難
ㄊㄢ · tān
noun — a shoal, sandbank, beach; rapids
字源 FORM — what the parts do
氵義water
{n,t}ITnán → tān — initial and tone both shift
Water (氵) with 難 nán, the hard, the difficult. Where the water runs thin the bed shows through — a sandbar, a beach, the shallows a boat struggles past (沙灘, 灘頭). The river's hard place. The sound slid from nán to tān. The same 難 in 攤 spreads goods on the ground with a hand 扌.
故事 STORY — a scene to remember it by
水（氵）退得淺，沙地一片露出來，船難（難）行。
The water (氵) draws shallow, a sheet of sand shows through — hard (難) going for a boat.
字源記憶法
意 · Meanings
(本義)沙灘、海灘— shoal, sandbank, beach常用
→灘頭、險灘— the rapids, a difficult shallows
(本義) original meaning · → ⇒ each arrow = one more step of extension