多い|おおいooi[1]atamadaka (head-high)

1. i-adjectivemany; numerous; a lot
   ２０代だいの若わかい女性じょせいの中なかには、夏休なつやすみに海外旅行かいがいりょこうにでたいと思おもう人ひとも多おおい。↗

   Many young women in their 20s plan to go abroad during their summer holidays.
2. i-adjectivelarge amount of; large quantity of; a lot; much
3. i-adjectivefrequent; common

• Synonym膨大ぼうだいNeutralEnormous to the point of being staggering, as in 「膨大なデータ」; mostly placed before nouns, while 「多い」 typically works as a predicate.
• SynonymおびただしいWrittenWritten/formal prose for numbers so large they stagger, often with a negative shade, as in 「夥しい血」; can also stress that something is extreme in degree.
• SynonymたくさんNeutralCommon in speech; it can modify verbs directly, as in 「たくさん食べる」 — something the adjective 「多い」 cannot do.
• Synonym大量たいりょうNeutralLarge quantities, typically of goods or output, as in 「大量生産」; sounds more objective and formal than 「多い」.
• SynonymぎょうさんCasualColloquial; a dialect word in Kansai and nearby regions meaning 'a lot'. In standard Japanese it usually suggests exaggeration or making too much of something.
• Synonym数多いかずおおいWrittenStresses sheer numbers, as in 「数多い作品の中から」; most often placed before the noun, and leans toward written style.
• Antonym少ないすくないNeutralThe direct opposite of 「多い」: small in number or amount.
• AntonymわずかNeutralAlso the opposite of 「多い」, but stresses that the amount is extremely small — 'only' or 'just'.

Use 「多い」 as the default predicate for 'many'; to modify a verb, switch to 「たくさん」. For large volumes of goods use 「大量」, for staggering scale 「膨大」, and in formal writing 「夥しい」.

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

1. あるものに比較ひかくして、数量すうりょうや割合わりあいが大おおきい。
2. 頻度ひんどが高たかい。よく見みられる。