更新 (gēng xīn) literally combines 更 (gēng), meaning 'to change' or 'to replace', and 新 (xīn), meaning 'new'. Together, they express the action of making something current or bringing it up to date — like refreshing content, upgrading software, or revising information. As a verb, it’s commonly used with objects (e.g., 更新软件, 更新资料) and often appears in digital, administrative, and media contexts.

As an adjective, 更新 means 'latest' or 'most recent' and typically modifies nouns directly (e.g., 更新版本, 更新消息). It implies freshness and timeliness rather than novelty for its own sake. The word is neutral in register — appropriate in both formal reports and casual conversation — and frequently appears in compound words like 更新日志 (update log) or 自动更新 (automatic update).