TSUMUGU · TOCFL 2 (est.) · 字
投
投 ＝ 扌 ＋ 殳
ㄊㄡˊ · tóu
verb — to throw; to cast into
字源 FORM — what the parts do
扌義a hand
殳義a hand with a long weapon — the lance
A hand (扌) and a lance (殳) — the throw. Whatever leaves the hand and lands on the far side is 投: 投球 pitches it, 投入 throws yourself in, 投資 throws money in, 投票 casts the vote.
故事 STORY — a scene to remember it by
手臂往後一收，長矛（殳）離手（扌），飛出去。
The arm draws back; the lance (殳) leaves the hand (扌) and flies.
字源記憶法
意 · Meanings
(本義)投擲— to throw常用
→投入、投資— to throw in — devote; invest
→投票— to cast a ballot
(本義) original meaning · → ⇒ each arrow = one more step of extension