付加・附加|ふかfuka[1]atamadaka (head-high)

1. suru verb, transitive verb, no-adjectiveaddition; annexation; appendage
   スミスのアプローチは、接辞せつじ付加ふかということを考慮こうりょに入いれない点てんでほかと非常ひじょうに異ことなっている。↗

   Smith's approach differs greatly from others in that he did not take the affixation into consideration.

• Synonym添加てんかWrittenWritten-style term for adding substances, as to food or medicine, e.g. 「食品添加物」; 「付加」 leans toward attaching functional value.
• Synonym付け加えるつけくわえるNeutralVerb for adding something or supplementing a remark, e.g. 「一言付け加える」; 「付加」 is a written-style noun.
• SynonymプラスCasualColloquial loanword for adding something or a positive effect, e.g. 「プラスになる」; 「付加」 focuses on the attachment itself.
• Synonym追加ついかNeutralAdding something afterwards, e.g. 「追加注文」; 「付加」 leans toward attaching something onto an existing base.
• Synonym付与ふよFormalFormal term for granting authority or qualifications, e.g. 「権限付与」; 「付加」 leans toward attaching things.
• Synonym補足ほそくWrittenWritten-style term for supplementing what an explanation lacks, e.g. 「補足説明」; 「付加」 leans toward extra attachment.
• Synonym加えるくわえるNeutralVerb covering adding and merging in, with the broadest range of use; 「付加」 is a written-style noun leaning toward added value.
• Synonym足すたすCasualColloquial verb for adding, topping up, or arithmetic addition; 「付加」 is a written-style noun.
• Synonym付け足すつけたすCasualColloquial verb for adding something on afterwards, e.g. 「説明を付け足す」; 「付加」 is a written-style noun.
• Synonym付け足しつけたしCasualColloquial for something added on later, often with a nuance of being incidental; 「付加」 is written-style and leans toward attaching functional value.
• RelatedおまけCasualColloquial for a freebie thrown in with a purchase or embellishment, e.g. 「おまけ付き」; 「付加」 leans toward functional attachment.
• Related補完ほかんWrittenWritten-style term for filling gaps to make something complete, e.g. 「相互補完」; 「付加」 leans toward extra attachment.
• Related補充ほじゅうNeutralReplenishing personnel or supplies that are lacking, e.g. 「人員補充」; 「付加」 leans toward extra attachment.
• Related添付てんぷWrittenWritten-style term for attaching files to documents or emails, e.g. 「添付ファイル」; 「付加」 is broader.
• Related補いおぎないNeutralMaking up for what is insufficient or lacking; 「付加」 leans toward extra attachment.
• Related増補ぞうほWrittenWritten-style term for augmenting a book's content in a new edition, e.g. 「増補版」; 「付加」 is broader.
• Related増すますNeutralVerb for quantity or degree increasing; 「付加」 leans toward attaching something new.
• Related填補てんぽFormalFormal term for making up a deficit or loss, e.g. 「損失の填補」; 「付加」 leans toward extra attachment.
• Related加増かぞうFormalFormal term, historically for increases to stipends or domains; 「付加」 leans toward functional attachment.
• Antonym削除さくじょNeutralDeleting text or data; the opposite of 「付加」 on the add-versus-remove axis.
• Antonym除去じょきょWrittenWritten-style term for removing obstacles or impurities; opposite of 「付加」 in adding versus taking away.

Use 「付加」 for attaching something onto an existing base, as in 「付加価値」 or 「付加税」. For adding something afterwards, pick 「追加」; for supplementing an explanation, 「補足」; for adding substances to food or medicine, 「添加」; for attachments to documents or emails, 「添付」. The opposites, for removing rather than adding, are 「削除」 and 「除去」.

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

1. あるものの上うえに付け加つけくわえること。
2. （化学かがく）二に重じゅう結合けつごうが開裂かいれつし、元素げんそや原子げんし団だんが結むすびつくこと。