広い|ひろいhiroi[2]nakadaka (mid-high)

1. i-adjectivespacious; vast; wide
   ジョンソン氏しの部屋へやは広ひろかった。↗

   Mr Johnson's was a large room.

• Synonym広大こうだいWrittenWritten prose for vast, boundless land or sea, far stronger than 「広い」—「広大な土地」; not normally used of an ordinary room.
• Synonym手広いてびろいNeutralCovers roomy spaces but often means wide-ranging business or dealings, as in 「手広く商売する」. For everyday talk of a spacious room, 「広い」 is the usual choice.
• SynonymワイドNeutralA loanword that mostly appears in compounds like 「ワイド画面」 and 「ワイドショー」. Use 「広い」 when simply describing a room or piece of land as wide.
• Synonym幅広いはばひろいNeutralMeans physically wide, but often broad in range—「幅広い知識」, 「幅広い年齢層」—stressing variety of coverage more than 「広い」 does.
• Synonym広々としたひろびろとしたNeutralStresses the pleasant openness of a space with nothing blocking it, mostly before nouns as in 「広々とした部屋」. 「広い」 is more versatile, covering both area and range.
• Synonym幅広はばびろNeutralMostly as 「幅広の」 before items like belts, shoes, or ribbons, meaning wide across. 「広い」 applies to far more things.
• RelatedでかいCasualColloquial for anything big—size, area, or scale; both 「でかい家」 and 「でかい音」 work. 「広い」 is neutral, covering area, width, and also range or breadth of mind.
• RelatedおっきいCasualColloquial variant of 「大きい」, heard mostly from children or in casual talk, about size or degree. 「広い」 covers area, width, and broad range.
• Related大規模だいきぼWrittenWritten prose for large-scale construction, events, or organizations, as in 「大規模な工事」. 「広い」 is about space and range, not scale.
• Related大きいおおきいNeutralThe general word for big in volume, quantity, scale, or sound; 「大きい部屋」 is fine too. 「広い」 speaks only of area, width, or range.
• Related広範こうはんWrittenWritten prose for wide-ranging influence or knowledge, as in 「広範な影響」. For actual physical spaciousness, use 「広い」.
• Related大おおWrittenDuplicate entry; take its word-building use meaning great or high in degree. For spacious rooms or land, 「広い」 is still the word.
• Related巨大きょだいWrittenFor enormous volume, scale, or influence—「巨大な建物」, 「巨大な市場」. 「広い」 covers only area, width, or range.
• Related膨大ぼうだいWrittenFor quantities or scale swelling to enormous size—「膨大な資料」, 「膨大な費用」. 「広い」 speaks of area and range, not quantity.
• RelatedどでかいCasualStronger than 「でかい」; colloquially describes things, buildings, or sites that are astonishingly huge. 「広い」 carries no such exaggeration.
• Related馬鹿でかいばかでかいCasualColloquial with strong exaggeration, for things, houses, or land ridiculously huge. In normal contexts say 「広い」 or 「大きい」.
• Related大きおおきWrittenA prefix or word-building element meaning great or higher in rank; it cannot stand alone as a predicate the way 「広い」 does for area.
• Related大いおおいWrittenAn old form surviving mainly as 「大いに」 or 「大いなる」, for great degree. To describe a broad area, use 「広い」.
• Related広闊こうかつWrittenWritten prose for vast, open terrain with sweeping views, mostly fields and landscapes; rare in daily use—say 「広い」 or 「広々とした」 aloud.
• Relatedど偉いどえらいCasualColloquial with a dialect flavor, for something tremendous or remarkable—「どえらい事になった」. Not specifically about area; use 「広い」 for width.

Default to 「広い」 for large area, width, or range. For big volume, quantity, or scale use 「大きい」; for vast land or sea, 「広大」; for broad abstract range, 「幅広い」 or 「広範」; for casual exaggeration, 「でかい」. The rest have narrower niches: 「ワイド」 in compounds, 「幅広」 for belts and shoes, 「大き」 and 「大い」 as prefixes, and written terms like 「大規模」, 「巨大」, 「膨大」, 「広闊」 for scale, enormous size, huge amounts, or sweeping vistas.

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

1. 面積めんせきが大おおきい。
2. 幅はばが大おおきい。
3. 進行しんこう方向ほうこう等とうに対たいして、垂直すいちょくとなる部分ぶぶんが大おおきい。
4. 布ぬのなど長方形ちょうほうけいのもので、短辺たんぺんが相対的そうたいてきに長ながい。
5. 【広ひろい、博ひろい、普ひろしい、汎ひろい】範囲はんいが多方面たほうめんに及およんでいる。
6. 【広ひろい、寛ひろい】小ちいさなことで怒おこったりせず、受容力じゅようりょくを持もっている。