追加|ついかtsuika[0]heiban (flat)

1. suru verb, transitive verb, no-adjectiveaddition; supplement; appending; appendix
   名簿めいぼに私の名前なまえも追加ついかしてください。↗

   Please add my name to the list.

• Synonym付加ふかWrittenAttaches something onto what already exists, as in 「付加価値」; leans written/formal rather than everyday.
• Synonym添加てんかNeutralAdding a substance into something, as in 「食品添加物」; typical of chemistry and food contexts.
• Synonym加算かさんNeutralAdding numbers or values, as in 「ポイント加算」; centered on calculation rather than physical adding.
• Synonym補足ほそくNeutralAdds material to make up for what is missing or insufficient, as in 「補足説明」; the emphasis is on filling a gap.
• SynonymプラスNeutralLoanword for adding on; common in speech, as in 「プラスする」.
• Related添付てんぷNeutralAttaching documents or files, as in 「ファイルを添付する」; typical of emails and paperwork.
• Related添え物そえものNeutralSomething added alongside the main item as an accompaniment, like a side dish; carries a secondary nuance.
• Related増加ぞうかNeutralAn increase in quantity, as in 「人口増加」; about growing in number, not adding something on.
• Related付録ふろくNeutralAn appendix of a book or magazine, or a bonus booklet or gift; 「追加」 is adding something in afterwards.
• RelatedおまけCasualColloquial; a freebie thrown in with a purchase, as in 「おまけ付き」; stresses the extra gift.
• Related増大ぞうだいWrittenGrowing larger in scale, as in 「負担が増大する」; leans written/formal.
• Related付け足しつけたしCasualColloquial; a part added on afterwards, often with a nuance of being superfluous.
• Related加増かぞうWrittenWritten/formal; an increase, especially historically of stipend or territory.
• Related増分ぞうぶんWrittenWritten; a mathematical and technical term for an increment.
• Related増ぞうNeutralA single character for increase, mostly used as a prefix or suffix, as in 「三割増」.
• Antonym削除さくじょNeutralAntonym: deletion, the opposite of 「追加」, as in 「データを削除する」.
• Antonym除去じょきょWrittenAntonym: removal, the opposite of adding; leans written/formal.

Use 「追加」 for adding something on top of what already exists. For attaching files use 「添付」, for filling a gap 「補足」, for adding a substance 「添加」, and for quantities growing 「増加」. 「付加」 and 「増大」 lean written; 「付け足し」 and 「お負け」 are colloquial; 「加算」 is numeric addition, 「付録」 an appendix or bonus booklet, and 「削除」 the opposite — deleting.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 既すでにあるものに、後あとから付け加つけくわえること。また、そのもの。