紙（かみ、kami）
- paper

The Japanese word 紙 ([紙] , かみ - kami) primarily means "paper." It refers to the thin material used for writing, printing, and packaging. It can also refer to things made of paper.

⚫︎手紙を書くために紙が必要だ。 Translation: I need [紙] paper to write a letter. ⚫︎この箱は[紙]でできている。 Translation: This box is made of [紙]. ⚫︎[紙]飛行機を作った。 Translation: I made a [paper] airplane.

⚫︎You use 紙 when you are talking about [paper] in its various forms. ⚫︎It can be used in both formal and informal conversations. ⚫︎It is a common and essential word in daily life.

⚫︎The standard way to write this word is with the kanji 紙. ⚫︎The hiragana reading is かみ. ⚫︎There are no other ways to write this word. ⚫︎Okurigana (the suffix hiragana) is not applicable.

There are no direct synonyms for [紙] that completely replace it. However, related words or phrases might be used depending on context: ⚫︎用紙 (ようし - yōshi): Forms or sheets of [paper]. ⚫︎画用紙 (がようし - gayōshi): Drawing [paper].

There aren't specific antonyms, but you could consider materials that are not [paper] : ⚫︎布 (ぬの - nuno): Cloth ⚫︎木 (き - ki): Wood ⚫︎金属 (きんぞく - kinzoku): Metal

宿題を[紙]に書いてください。 ・Translation: Please write your homework on [paper]. ・Explanation: This sentence uses 紙 to refer to the material used for writing the homework.

この本は再生[紙]で作られています。 ・Translation: This book is made of recycled [paper]. ・Explanation: This sentence includes 紙 and specifies that the paper is recycled.

The etymology of 紙 is related to its original meaning of "things made of pulp". The kanji 紙 itself is a phono-semantic compound (形声文字), with the "糸" (いと - ito), meaning "thread" or "string" and the phonetic part 氏 (shi). Over time, the meaning narrowed to what we know today as [paper].