TSUMUGU · TOCFL B2 (est.) · 字
艘
艘 ＝ 舟 ＋ 叟
ㄙㄡ · sōu
measure word — for boats and ships (一艘船)
字源 FORM — what the parts do
舟義a boat
叟聲sǒu — the phonetic, worn forward to sōu
Tsǒu → sōu — same sound, the tone flattened to first
A boat (舟) with 叟 sǒu for the sound — the word you count hulls with: 一艘、兩艘. The donor 叟 reads sǒu; in 艘 it flattened to sōu. 叟 also gives 搜、餿.
故事 STORY — a scene to remember it by
江上一條船（舟）一條船地過——一艘，兩艘。
Boats (舟) cross the river one hull at a time — one 艘, two 艘.
字源記憶法
意 · Meanings
(本義)一艘船— a measure word for vessels常用
→艦艘— ships, vessels (collectively)
(本義) original meaning · → ⇒ each arrow = one more step of extension