How to Write 阈 (yù) — Meaning “threshold”

Picture a door (门) with a sign that says "or" (或) on it: you can choose to step across or stop. This mnemonic links the character to the idea of a threshold, the point where a decision or change happens.

Write the outer door radical 门 first: left vertical, top horizontal, then right hook. Inside, write 或 with correct stroke order: horizontal, left-falling, vertical, horizontal fold, hook, left-falling, dot. A common mistake is making the inner component too large or unbalanced; keep it centered and slightly smaller than the door frame.

阈 has 或 inside and means "threshold" (limit/entrance). 闺 (guī) contains 圭 (jade) and means "boudoir" or "lady's room." 闻 (wén) contains 耳 (ear) and means "to hear." Visually, look at the inner part: 或 for threshold, 圭 for room, and 耳 for hearing.

阈 appears mainly in technical or academic language, such as 阈值 (yù zhí, threshold value) in science and engineering. You also see it in 听阈 (hearing threshold) for audiology and 视阈 (visual field) for eye examinations. It is rarely used in everyday conversation, so you will mostly encounter it in formal or specialized texts.

Common words containing 阈 include: 阈值 (yù zhí) — threshold value; 听阈 (tīng yù) — hearing threshold; 视阈 (shì yù) — Visual field; threshold of vision.