四角(しかく)

しかく
noun, na-adjective
square, rectangle
descriptive
See also: 資格(しかく) (qualification), 視覚(しかく) (sight, vision), 死角(しかく) (blind spot), 四角(しかく)い (adjective form)
1. square, rectangle, quadrangle
A shape with four sides and four angles.
四角(しかく)い形(かたち)
A square shape.
四角(しかく)を描(えが)く。
To draw a square.
紙(かみ)を四角(しかく)に切(き)る。
To cut paper into a square.
この箱(はこ)は四角(しかく)い形(かたち)をしているので、積(つ)み重(かさ)ねやすい。
This box has a square shape, so it's easy to stack.

四角(しかく) is a general term for any four-sided shape — squares, rectangles, and other quadrilaterals. It is the everyday word; for precise geometric terms, see below.

Forms

  • 四角(しかく) (noun): a square/rectangle
  • 四角(しかく)い (i-adjective): square-shaped, boxy — the most natural adjectival form
  • 四角(しかく)な (na-adjective): less common in everyday speech

RELATED WORDS (geometry):

Related words

Usage

In everyday conversation, 四角(しかく)い is used broadly to describe anything boxy or rectangular: 四角(しかく)い箱(はこ) (square box), 四角(しかく)い顔(かお) (square face).

Related Words

Related: 三角(さんかく) (triangle)
Related: 丸(まる) (circle)
Related: 丸(まる)い (round)
Related: 六角(ろっかく) (hexagon)
Related: 正方形(せいほうけい) (square)
Related: 長方形(ちょうほうけい) (rectangle)
general
Added 2026.1.11 18:01 · Revised 2026.10.10 4:21
02500/02836_shikaku