おっきい・大っきいokkii

1. i-adjectivebig; large; great

• SynonymでかいCasualColloquial and rougher than 「おっきい」; used for big, bulky things with a casual or slightly coarse feel, as in 「でかい声」.
• Synonym大きいおおきいNeutralThe standard word for big; 「おっきい」 is simply its colloquial, childlike variant, so 「大きい」 fits any register.
• Synonym巨大きょだいNeutralLeans toward written prose; describes things of astonishing scale, as in 「巨大な建物」, rather than everyday bigness.
• Synonym大型おおがたNeutralNeutral; classifies things by size class or specification, as in 「大型車」, rather than simply saying something is big.
• SynonymどでかいCasualColloquial emphasis on 「でかい」 for something super-sized, with a playful, exaggerated feel, as in 「どでかい花火」.
• Synonym馬鹿でかいばかでかいCasualColloquial and hyperbolic: ridiculously, unbelievably big, often voicing surprise, as in 「ばかでかい家」.
• Related膨大ぼうだいNeutralNeutral; used for enormous quantities, as in 「膨大な資料」; unlike 「おっきい」 it focuses on amount rather than physical size.
• Related極大きょくだいWrittenWritten/formal prose; means extremely large, and in mathematics a local maximum; in everyday description 「大きい」 is the usual choice.
• AntonymちっちゃいCasualAntonym meaning tiny; like 「おっきい」, it is a childish, colloquial form, here of 「小さい」.

「おっきい」 is the friendly, colloquial way to say something is big, as in 「おっきいね」; the standard word is 「大きい」, and rough casual speech uses 「でかい」. For astonishing scale choose 「巨大」, for vast amounts 「膨大」, for size classes 「大型」, and for exaggerated hugeness 「どでかい」 or 「馬鹿でかい」. 「極大」 belongs to formal or mathematical writing, and the opposite of 「おっきい」 is the equally childlike 「小っちゃい」.

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

1. サイズや量りょう、程度ていどが普通ふつうより勝かっている。