一等・１等|いっとうittou[3]nakadaka (mid-high)

1. no-adjectivefirst class; first rank; first grade; first place; first prize
   １等とうになるなんて夢ゆめにも思おもわなかった。↗

   Never did I dream of winning first prize.
2. nounone degree; one level; one grade
3. adverbmost; best

• Synonym一番いちばんNeutralThe everyday word for first or best, and the most common choice. 「一等」 leans toward being first in a grade or class, as in 「一等賞」 and 「一等地」.
• Synonym一級いっきゅうNeutralMeans one grade or the first grade. 「一等」 is more about the grades of prizes or plots of land.
• Synonym一流いちりゅうNeutralFirst-rate or top-flight quality. 「一等」 is more about rank or placing within a grade.
• Synonym随一ずいいちWrittenWritten/formal prose for second to none, as in 「当代随一」. 「一等」 is a grade or class.
• Synonym第一だいいちNeutralFirst or foremost in order or importance. 「一等」 leans toward rank or grade placing.
• SynonymナンバーワンCasualColloquial loanword for number one. 「一等」 leans toward grade.
• RelatedトップNeutralLoanword for the top spot or senior management. 「一等」 leans toward grade.
• Related第１級だいいっきゅうNeutralThe highest grade or level, as in 「第一級資料」. 「一等」 leans toward prize placing.
• Antonym三等さんとうNeutralThird class, ranking below 「一等」 on the scale of grades.
• Antonym末等まっとうWrittenWritten/formal prose for the lowest grade, the opposite of top-ranked 「一等」.

Use 「一等」 for the top grade of prizes, land, or train cars, as in 「一等賞」「一等地」. For everyday first or best pick 「一番」, for first-rate quality 「一流」, for second to none in formal writing 「随一」; the opposites are 「三等」 and 「末等」.

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

1. 第だい一いち。一番いちばん。最上さいじょう。第だい一いち位い。
2. 等級とうきゅうの一ひとつの段階だんかい。一いち段階だんかい分ぶん。
3. （副詞ふくし的てきに）最もっとも。