‘永恒’ (yǒnghéng) is an adjective meaning ‘eternal’ or ‘timeless’—describing something that lasts forever, without beginning or end. The first character 永 (yǒng) means ‘forever’ or ‘perpetually’, often evoking boundlessness in time; the second character 恒 (héng) means ‘constant’, ‘enduring’, or ‘unchanging’. Together, they form a compound emphasizing absolute, unbroken continuity—stronger and more poetic than either character alone. It’s commonly used in literary, philosophical, or emotional contexts: love, truth, memory, nature, or ideals.

While it can technically modify nouns directly (e.g., 永恒的爱), it frequently appears in abstract or elevated expressions—poetry, speeches, slogans, or heartfelt declarations—not in casual daily speech. It carries a solemn, almost sacred weight, so using it for mundane things (e.g., ‘eternal coffee’) would sound exaggerated or ironic. Learners should note that it rarely functions as a noun on its own; when nominalized, it usually appears with 的 or in phrases like 永恒之美 (the beauty of eternity).