ateji
1.

A method of using kanji characters based on their pronunciation rather than their original meanings to create a representation of a word, often resulting in a unique, culturally accepted writing style.

2.

A form of kanji usage where characters are assigned to words based primarily on sound, which may lead to non-standard or arbitrary combinations that deviate from traditional meanings.

3.

Kanji that are utilized to phonetically represent words in a way that differs from their intended meanings, often adopted over time as a common writing practice for specific expressions or names.