追加（ついか、tsuika）
- addition

The Japanese word 追加 （ついか, *tsuika*) generally means "addition," "supplement," or "to add." It refers to the act of including something more, extending, or supplementing an existing item, list, or process. It suggests an augmentation or an increment. The meaning is very broad and can be used in numerous contexts. The core concept is about bringing something extra into the mix. This action can be applied to tangible things or intangible concepts, like information.

⚫︎ 新しい機能を追加します。 Translation: I will add a new function. ⚫︎ 会議の議題に項目を追加してください。 Translation: Please add an item to the agenda for the meeting. ⚫︎ 注文に追加で、デザートを追加できますか？ Translation: Can I add a dessert to my order?

⚫︎ 追加 is a versatile word, and you can use it in a wide array of situations. ⚫︎ It is appropriate in formal and informal settings. ⚫︎ It can be employed to discuss items being added to a list, features being included in software, or any other instance where something is getting augmented. ⚫︎ You can use it in conversation, writing emails, reports, or giving instructions. ⚫︎ When you want to express the action of adding something, 追加 is the most direct term.

⚫︎ The word 追加 is typically written with the kanji 追加, but it can also be written in hiragana ついか. ⚫︎ The reading, ついか, is written in hiragana. ⚫︎ There are no variations in the okurigana for this word.

⚫︎ 加える (*kuaeru*): to add, to put in (similar but slightly less formal). ⚫︎ 付加 (*fuka*): addition, supplement (more formal, often used in technical contexts). ⚫︎ 増やす (*fuyasu*): to increase, to add more (focuses on increasing the quantity). ⚫︎ 増やす (*masu*): to increase, to add more (focuses on increasing the amount). ⚫︎ 付け加える (*tsukekuaeru*): to add (something to something else).

⚫︎ 削除 (*sakujo*): deletion, to delete. ⚫︎ 減らす (*herasu*): to reduce, to decrease. ⚫︎ 除く (*nozoku*): to remove, to exclude. ⚫︎ 削減 (*sakugen*): reduction, cut.

このレポートに、さらに情報を追加してください。 ・Translation: Please add more information to this report. ・Explanation: This sentence uses 追加 to instruct someone to include extra data in a report.

ソフトウェアのアップデートで、新しい機能が追加されました。 ・Translation: A new feature was added in the software update. ・Explanation: This example explains how a 追加tion of a feature occurred with a software update.

The word 追加 is composed of two kanji: 追 （*tsui*), meaning "to pursue," "to follow," or "to add," and 加 (*ka*), meaning "to add," "to increase," or "to join." Together, these kanji convey the meaning of adding something to what already exists, which aligns with the core meaning of 追加. The etymology reflects the act of bringing something else into a state of association.