The word 更改 is formed as a synonymous compound, combining two characters with similar meanings to create a more precise or emphatic term. The character 更 (gēng) carries the core meaning of "to change" or "to replace", while 改 (gǎi) means "to alter" or "to correct". By pairing these two semantically related verbs, the compound 更改 is created, which means "to change", "to alter", or "to modify", often referring to a deliberate revision of plans, rules, or data, with the combined force of both characters reinforcing the sense of making an amendment.