How to Write 窸 (xī) — Meaning “rustle (sound)”

Imagine you are in a cave (穴) and suddenly you 'hear all' (悉) a strange rustling sound from the darkness. The bottom part 悉 looks like a ear (the left side 忄) and a heart (the right side 心) listening carefully. This visual helps link the character to the idea of a soft, mysterious rustle.

The top radical 穴 is wide, covering the lower part; the dots on both sides of the cave roof should be symmetrical and not too large. The lower part 悉 has a narrow left component (忄) and a broader right (心), so keep the strokes balanced—the heart radical must be written with a smooth, curved bottom stroke. A common mistake is making the 穴 too small or the 心 too narrow, which ruins the character's proportion.

窸 (xī) specifically means a rustling sound, while 窨 (yìn or xūn) relates to an underground cellar or storing something in a pit. 窬 (yú) means a hole or to bore through a wall. Visually, 窸 has the phonetic 悉 underneath, 窨 has 音 (sound), and 窬 has 俞 (yú). Their meanings are unrelated: only 窸 is onomatopoeic for soft noises.

窸 almost always appears in the reduplicated form 窸窣 (xī sū) or 窸窸窣窣 (xī xī sū sū), imitating light rustling sounds like leaves, paper, or fabric. It is a literary onomatopoeia and is not used in everyday conversation; you might find it in novels or nature descriptions. There is no special cultural note beyond its poetic, sound-imagery function.

Common words containing 窸 include: 窸窣 (xī sū) — rustle; 窸窸窣窣 (xī xī sū sū) — rustling sound (onomatopoeia); 窸声 (xī shēng) — rustling sound.