微弱 (wēi ruò) is an adjective meaning 'weak' or 'feeble', describing something that is barely perceptible—whether physically, audibly, visually, or emotionally. The first character 微 (wēi) means 'tiny', 'slight', or 'minute', while the second character 弱 (ruò) means 'weak' or 'fragile'. Together, they intensify the sense of extreme faintness or low intensity, implying not just weakness but near-invisibility or near-inaudibility.

This word is commonly used to describe soft sounds (e.g., a whisper), dim light, faint signals, weak physical strength (especially in medical contexts), or subtle emotions and reactions. It carries a neutral-to-slightly-negative connotation and is more formal and literary than common alternatives like 软 (soft) or 差 (poor). It frequently appears in health reports (e.g., '微弱的脉搏'), scientific descriptions, and descriptive writing where precision about degree matters.