四角い describes anything that has four corners, covering both squares and rectangles.
Word in 30 Seconds
- Describes objects with four corners and four sides.
- Used for squares and rectangles in daily life.
- Commonly used to contrast with round shapes.
概要
「四角い」は、四つの辺と四つの角を持つ図形的な形状を表す言葉です。数学的な正方形（スクエア）だけでなく、長方形（レクタングル）を含む広い意味で使われます。日常会話では、丸いものに対する対義的な表現として頻繁に登場します。
類語との比較
「正方形」は数学的で厳密な正方形のみを指しますが、「四角い」はより日常的で、長方形や少し歪んだ四角形も含む広い概念です。また、「四角張った」という言葉は、形だけでなく、性格が堅苦しいことを比喩的に表現する場合にも使われます。
Examples
机の上に四角い箱があります。
everydayThere is a square box on the desk.
四角いパンを四つに切ります。
informalI will cut the square bread into four pieces.
この土地は四角い形をしています。
formalThis plot of land is square-shaped.
四角い図形を二つ組み合わせてください。
academicPlease combine two square figures.
Common Collocations
Common Phrases
四角四面
Stiff and formal; square-faced
Often Confused With
Refers strictly to a square with equal sides. Use this in math or technical contexts.
Refers strictly to a rectangle. '四角い' is a more general term that covers both.
Grammar Patterns
How to Use It
Usage Notes
四角い is a neutral, everyday adjective. It is appropriate for both formal and informal settings when describing shapes. Avoid using it to describe people's physical features to prevent sounding rude.
Common Mistakes
Some learners confuse '四角い' with '四角', using the noun where the adjective is needed. Remember that 'い' is required to describe the shape of an object. It does not mean 'a square' but rather 'square-shaped'.
Tips
Use for any four-sided object
Don't worry about perfect squares. Use it for rectangles, boxes, and any object with four corners.
Avoid using for people's faces
Calling a person's face '四角い' can be rude or sound like a critique of their appearance. Be careful with physical descriptions.
Japanese Bento boxes
Many traditional Japanese bento boxes are '四角い'. This shape is preferred for efficiency in packing food.
Word Origin
Derived from '四' (four) and '角' (corner), followed by the adjectival suffix 'い'. It literally means 'having four corners'.
Cultural Context
In Japan, the concept of '四角い' is often linked to order and efficiency. Traditional architecture and bento boxes prioritize this shape for space-saving.
Memory Tip
Think of a 'Square' box. Since it has four corners, it is 'Shi-kaku-i' (Shi=4, Kaku=corner).
Frequently Asked Questions
4 questions「正方形」は縦と横の長さが同じ四角形という数学的な定義を指します。一方、「四角い」は形が四角であることを示す日常的な言葉で、長方形も含まれます。
直接的な形として使うことは少ないですが、「四角張った性格」のように、融通が利かない、堅苦しいという比喩的な意味で使われることがあります。
はい、形状を対比させる際に最もよく使われる対義語です。丸いものと四角いものを区別する際によく用いられます。
「四角」は名詞で「四角形」そのものを指します。一方、「四角い」は形容詞で、物の性質や形状を説明するために使います。
Test Yourself
この部屋は___形で、家具を置きやすいです。
部屋の形を説明する際、四角いという形容詞が最も自然です。
Score: /1
Summary
四角い describes anything that has four corners, covering both squares and rectangles.
- Describes objects with four corners and four sides.
- Used for squares and rectangles in daily life.
- Commonly used to contrast with round shapes.
Use for any four-sided object
Don't worry about perfect squares. Use it for rectangles, boxes, and any object with four corners.
Avoid using for people's faces
Calling a person's face '四角い' can be rude or sound like a critique of their appearance. Be careful with physical descriptions.
Japanese Bento boxes
Many traditional Japanese bento boxes are '四角い'. This shape is preferred for efficiency in packing food.
Examples
4 of 4机の上に四角い箱があります。
There is a square box on the desk.
四角いパンを四つに切ります。
I will cut the square bread into four pieces.
この土地は四角い形をしています。
This plot of land is square-shaped.
四角い図形を二つ組み合わせてください。
Please combine two square figures.
Related Content
More general words
能力
A1Nouryoku refers to the mental or physical power, skill, or capacity required to perform a specific task or function. It can describe both innate talent and skills acquired through learning and practice.
異常
A1A word used to describe something that deviates from the normal state, standard, or expected pattern. It often implies a problem, malfunction, or an extraordinary occurrence that requires attention or investigation.
～について
A2About, concerning; indicates topic.
〜について
B1About, concerning; on the subject of.
～ぐらい
A2about, approximately
ぐらい
A2About; approximately; to the extent of.
ごろ
A2About, approximately (time).
うえ
A2At a higher position than.
絶対
B1Absolutely; definitely; never.
絶対に
B1Absolutely; definitely.
