灵验 (líng yàn) is an adjective meaning 'effective'—specifically when referring to traditional remedies, prayers, rituals, or folk practices that produce the desired result, especially in ways that seem almost miraculous or spiritually potent. The first character 灵 (líng) means 'spirit', 'soul', or 'supernatural power', while 验 (yàn) means 'to verify', 'to test', or 'evidence'. Together, they convey the idea of something whose efficacy has been spiritually or empirically confirmed—often implying a sense of wonder or reverence.

This word is commonly used in contexts involving traditional Chinese medicine, temple offerings, talismans, fortune-telling, or ancestral worship. It carries a slightly formal or literary tone and is rarely used for modern, scientifically proven treatments (e.g., antibiotics or surgery). Instead, it evokes cultural belief systems where intention, spiritual alignment, and observable results converge—such as a herbal remedy relieving pain after years of failure, or a vow made at a temple followed by unexpected good fortune.