巨大|きょだいkyodai[0]heiban (flat)

1. na-adjective, nounhuge; gigantic; enormous
   巨大きょだいなタンカーがついに今し方いましがた出港しゅっこうした。↗

   The huge tanker has just left the dock.

• SynonymでかいCasualColloquial word for something big in physical size, with a rough, blunt feel; 「巨大」 is more written-formal and stresses astonishing scale.
• SynonymおっきいCasualA colloquial, childlike way of saying 「大きい」; the degree is ordinary and falls short of 「巨大」.
• Synonym膨大ぼうだいNeutralDescribes vast quantity or scale, as in 「膨大な資料」; stresses sheer amount, while 「巨大」 stresses physical bulk.
• Synonym甚大じんだいWrittenWritten word for grave damage or impact, as in 「被害甚大」; used mostly for negative things.
• Synonym莫大ばくだいNeutralDescribes enormous sums or quantities, as in 「莫大な費用」; centers on amount.
• Synonym大きいおおきいNeutralThe everyday, most common word for big; 「巨大」 is stronger, for extraordinarily large things.
• Synonym極大きょくだいWrittenWritten or mathematical term for extremely large, or a maximum value; leans technical, while 「巨大」 is the everyday word for huge size.
• SynonymどでかいCasualColloquial emphatic word for something very big, with an exaggerated tone.
• Synonym馬鹿でかいばかでかいCasualColloquial: ridiculously big, carrying surprise or a dismissive nuance.
• RelatedものすごいCasualColloquial for an astonishing degree, not limited to size; overlaps with 「巨大」 only in expressing great degree.
• Related凄まじいすさまじいNeutralDescribes an overwhelming, often frightening degree; not specifically about physical size.
• RelatedすごいCasualColloquial and extremely versatile: amazing, great, or extreme in degree; 「巨大」 states size, scale or influence without any note of admiration.
• Related絶大ぜつだいWrittenDescribes immense influence or popularity, as in 「絶大な人気」; mostly modifies abstract things.
• Related無量むりょうWrittenWritten word for an immeasurable amount, best known from 「感慨無量」.
• RelatedおびただしいWrittenWritten word for extremely numerous, as in 「夥しい数の人」; stresses many, not big.
• Related洪大こうだいWrittenRare written word for grand, immense scale; 「巨大」 is the usual choice.
• RelatedとてつもないNeutralDescribes things so big they defy common sense, as in 「とてつもない才能」; can also mean absurd or preposterous.
• Antonym微小びしょうWrittenAntonym: extremely tiny, mostly in scientific or technical writing; the opposite of 「巨大」.
• Antonym矮小わいしょうWrittenAntonym: small in stature, and by extension narrow in thought or outlook; the opposite of 「巨大」.

Use 「巨大」 for things enormous in size or scale. For everyday bigness say 「大きい」, or colloquial 「でかい」. For vast amounts use 「膨大」 or 「莫大」; for grave damage 「甚大」; for immense popularity or influence 「絶大」. The others add nuance: 「どでかい」「馬鹿でかい」 are emphatic slang, 「凄い」「物凄い」 express astonishing degree, 「途轍もない」 the unbelievable, 「夥しい」「無量」 written words for countless or immeasurable, 「洪大」「極大」 rare or technical, and 「微小」「矮小」 are the opposites.

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

1. 非常ひじょうに大おおきい様子ようす。