How to Write 内 (nèi) — Meaning “inside; inner; internal”

Imagine a person (人) walking through an open doorway (like the top of 内) into a room. The shape looks like a box with a person inside, so you can think of 'a person inside a box' to recall the meaning 'inner' or 'inside'.

The stroke order is: left vertical stroke, then top horizontal, then the inner hook stroke (like a smaller '入'), and finally the right vertical stroke. A common mistake is making the inner '入' too large — it should be contained within the outer box, not touching the top line completely. Keep the bottom of the box flat.

内 (nèi) means 'inside' and has a box-like enclosure with a person inside. 入 (rù) means 'enter' and looks like an open arrowhead pointing downward — no box around it. 全 (quán) means 'whole' or 'complete' and has a king (王) under a roof (人), so it is taller and has more strokes. Remember: 内 is a closed box; 入 is an open entrance; 全 has a '王' under a person.

内 appears in words like 室内 (indoor), 内容 (content), and 国内 (domestic). It is used to indicate location inside something, like a building, country, or text. Culturally, the concept of 'inner' vs 'outer' is important in Chinese philosophy, such as inner self (内心) vs outer appearance, so 内 often carries a sense of depth or essence.

Common words containing 内 include: 室内 (shì nèi) — Indoor; interior.; 内容 (nèi róng) — content; substance; 国内 (guó nèi) — Domestic / Internal.