'脆响' (cuì xiǎng) is a noun describing a sharp, clear, and crisp sound—like the sudden snap of a twig, the crack of a whip, or the quick pop of a bubble bursting. The first character 脆 (cuì) means 'brittle' or 'crisp', evoking qualities of lightness, clarity, and abruptness; the second character 响 (xiǎng) means 'sound' or 'to make a sound'. Together, they form a compound that emphasizes both the acoustic quality (high-pitched, clean, short-lived) and the physical sensation of something breaking or snapping cleanly.

This term is often used in descriptive writing and everyday speech to convey auditory vividness—especially for sounds produced by small, dry, or fragile objects. It’s common in nature descriptions (e.g., frost cracking on tree bark), cooking (e.g., the crunch of roasted peanuts), and animal behavior (e.g., the sharp call of certain birds or the snap of a lizard’s tail). While it can occasionally function adjectivally in phrases like '脆响的声音', it is grammatically and most naturally used as a noun referring to the sound itself.