投影 Origin — Dong Chinese Dictionary

tóuyǐng

project

tóu throw

Phonosemantic compound. 扌 represents the meaning and 殳 represents the sound.

扌 Meaning component

shou, shǒu hand

扌 is a component form of 手.

殳 Sound component

shū weapon or tool

Change in sound

投 and 殳 don't sound similar in modern Mandarin due to historical phonetic changes. They were more similar in Old Chinese.
投 *[d]ˤo
殳 *[d]o

Regular Modern

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	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	duw	[d]ˤo	throw

《說文》：“投，擿也。从手，从殳。”

Phonosemantic compound. 彡 represents the meaning and 景 represents the sound. The 彡 component depicts shadow lines.

彡 Iconic component

shān, xiǎn hair

Depicts shadow lines.

景 Sound component

jǐng scenery

	Middle Chinese	Old Chinese	Gloss
Baxter-Sagart	'jaengX	qraŋʔ	shadow (n.)