The 50 polyphonic words with phonetic bands are as follows:

1. Heavy (zhòng, chóng)

Important (zhòng yào), heavy (chóng) xīn), repeat (chóng fù)

2. Make a call (dǎ, dá)

Take a phone call (dǎ diàn huà), take a taxi (dǎ chē), play mahjong (dá má jiàng) )

3. Long (cháng, zhǎng)

Grow up (zhǎng dà), Great Wall (cháng chéng), long time (cháng shí jiān)

4. Buy (mǎi, mài)

Buy (mǎi dōng xī), buy (gòu mǎi), sell (mài dōng xī)

5. Give (gěi, jǐ )

Give (jǐ yǔ), water (jǐ shuǐ), supplies (gěi yǎng)

6. Sleep (jué, jiào)

Sleep (shuì jiào), feeling (jué de), awareness (jué chá)

7. Card (kǎ, qiǎ)

Bank card (yín háng kǎ), credit card (xìn yòng kǎ) , Guangua (guān qiǎ)

The origin of polyphonic characters

1. Phonological changes: In the development process of Chinese characters, due to phonetic changes or dialect differences, the pronunciation of the same character will change. Changes have resulted in multiple pronunciations. This change in pronunciation may be due to the merger, differentiation, fusion, etc. of sounds.

2. Text borrowing: Chinese characters have been used to record many different languages ??in history, including Chinese, Tibetan, Mongolian, etc. When different languages ??borrow the same Chinese characters, due to phonetic differences, the pronunciation of the Chinese characters will also be different, forming polyphonic characters.

3. Etymological diffusion: There is a relationship between the original meaning and the extended meaning of some words. With the development of language, the meaning of a certain word gradually spreads to related fields, resulting in the emergence of multiple pronunciations.