哈迪 Origin — Dong Chinese Dictionary

Hǎdí

Hardy

hā sound of laughter

Phonosemantic compound. 口 represents the meaning and 合 represents the sound.

口 Meaning component

kǒu, kou mouth

合 Sound component

hé to join

	Old Chinese
Zhengzhang	ŋɡuːb

Phonosemantic compound. 辶 represents the meaning and 由 represents the sound.

辶 Meaning component

chuò walk

辶 is a component form of 辵.

由 Sound component

yóu cause

Change in sound

迪 and 由 don't sound similar in modern Mandarin due to historical phonetic changes. They were more similar in Old Chinese.
迪 l'ɯːwɢ
由 *l[u]

Regular Modern

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	Old Chinese
Zhengzhang	l'ɯːwɢ

《說文》：“迪，道也。从辵，由聲。”