Ān níng literally combines 安 (ān, 'peace, safety') and 宁 (níng, 'calm, stillness'), together evoking a deep, serene state of inner and outer peace—free from disturbance, anxiety, or chaos. It describes both a personal emotional condition and an environmental atmosphere, such as a quiet village or a quiet moment after grief has eased.

This word is often used in formal, literary, or reflective contexts—common in writing about mental well-being, memorial inscriptions (e.g., on tombstones meaning 'eternal peace'), or descriptions of natural settings. Unlike casual terms like 平静 (píngjìng), ān níng carries warmth and a sense of gentle, enduring harmony. It’s rarely used for temporary calm; rather, it suggests stability and profound quietude—whether in a person’s heart, a sacred space, or a community recovering from hardship.