Liùshū zhōng de jiǎjiè bú zào xīn zì, érshì jièyòng dúyīn xiāngtóng de jiù zì.
Phonetic loan, one of the six categories of characters, creates no new character but borrows an existing one with the same sound.
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假借 is one of the 六书, the six traditional categories of Chinese characters. A word with no character of its own borrowed one that sounded the same: 来 once meant wheat and 而 once meant a beard. The 假 here means borrow, not false, the same as in 不假思索.
