How to say "enormous" in Japanese

Choosing the right word
  • でかいJLPT N1approx.Common
    i-adjectiveThe colloquial everyday word for something huge: a casual, spoken way to call an object big or enormous. Reach for it in conversation rather than formal writing.
    こんなデカイのがチャリの荷台にだいに乗のるわけないだろ。↗
    There's no way one that big is going to go on a bike's luggage rest.
  • 巨大きょだいJLPT N3approx.Common
    na-adjective, nounEnormous physical size or scale: gigantic buildings, creatures, machines, or organizations. When 'enormous' describes how big a concrete thing is, this is the word you usually want.
    The huge tanker has just left the dock.
  • 膨大ぼうだいJLPT N2approx.Common
    na-adjectiveEnormous in quantity: vast amounts of data, information, work, time, or money. Use it when 'enormous' means the sheer volume or number of something rather than physical size.
    インテル社しゃはその発明はつめいで膨大ぼうだいな特許料とっきょりょうを得えている。↗
    Intel gets a huge royalty from the invention.
  • 多大ただいCommon
    na-adjective, no-adjectiveGreat or enormous in amount or degree, typically of abstract things — effort, influence, damage, loss. Rarely the word for a physically enormous object; think 'a great deal of' rather than 'huge'.
    The typhoon has done much harm.
  • 絶大ぜつだいCommon
    na-adjective, nounTremendous or immense in degree, used for intangibles such as enormous support, popularity, trust, or influence. It is not the word for physically enormous things.
    天才てんさいとは従来じゅうらい、先天的せんてんてきに絶大ぜつだいな努力どりょくをなし得える能力のうりょくを備そなえた者ものとの定義ていぎが下くだされてきた。↗
    Genius has been defined as a supreme capacity for taking trouble.

Use 「でかい」 for casually calling something huge, 巨大 for enormous physical size, 膨大 for vast quantities, 多大 for great amounts of abstract things, and 絶大 for tremendous support, influence, or popularity.

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

Japanese equivalents
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

Say it right, write it right

Core lookup works fully offline, with cloud pronunciation and one-tap save & review. Free, no sign-up.

Free downloadWindowsFree downloadmacOSDownload on the App StoreGet it on Google Play
MobileiOS / Android

Android

QR code for the Google Play pageGet it on Google Play

Scan it with your Android phone to install, or search for “Tomoshi” on Google Play.

iOS

QR code for the App Store pageDownload on the App Store

Scan it with your iPhone camera to install, or search for “Tomoshi” in the App Store.

Install the browser extensionLook words up on any web page · Chrome / Edge / Safari

Screenshot of a Tomoshi lookup resultScreenshot of Tomoshi lookup results on a phone

Windows macOS Chrome / Edge / Safari extension iOS / Android