TSUMUGU · TOCFL 1 (est.) · 字
雙
雙 ＝ 隹 ＋ 又
ㄕㄨㄤ · shuāng
noun/measure word — a pair, both; a count for paired things (一雙手, 一雙鞋)
字源 FORM — what the parts do
隹義two short-tailed birds, stacked (雔)
Two birds (隹 doubled) and one hand (又) holding both. Two in the one hand — a pair. From there the count word for things that come paired: 一雙手、一雙鞋、雙方.
故事 STORY — a scene to remember it by
一隻手（又）一把抓住兩隻鳥（隹隹）——湊成一雙。
One hand (又) closes on two birds (隹隹) at once — a matched pair.
字源記憶法
意 · Meanings
(本義)持二隹— two birds held in the hand
→一雙、成雙— a pair, both常用
⇒雙手、雙方、雙倍— both / paired / double常用
(本義) original meaning · → ⇒ each arrow = one more step of extension