How to say "terribly" in Japanese

Choosing the right word
  • 大変たいへんJLPT N5approx.Common
    adverbCovers 'terribly' in its plain intensifying sense, 'very; awfully': a terribly long meeting, terribly sorry. It also doubles as an adjective meaning 'awful' or 'a great deal of trouble'.
    1日にち中ちゅう歩き回あるきまわって大変たいへん疲つかれた。↗
    I am dead tired from walking around all day.
  • ひどくCommon
    adverbUse it for 'terribly' in the sense 'badly; severely': terribly hurt, terribly worried. The degree it marks is unwelcome or severe, so it adds a negative coloring that a plain 'very' would not.
  • ずいぶんJLPT N4approx.Common
    adverb (with と)Covers 'terribly' only in its softened sense, 'quite; awfully': 'it took terribly long'. The degree is noticeably more than expected, and unlike ひどく it does not present things as bad.
    私わたしたちはもうずいぶん長ながくここにいます。↗
    We've been here long enough.
  • たいそうJLPT N2approx.Common
    adverbFor 'terribly' this is seldom the word you want: its force is 'exceedingly; greatly', and 大変 or ひどく will normally serve better. Keep it for contexts where you truly want that heightened 'exceedingly'.
    これはたいそう快適かいてきな暖炉だんろですね。↗
    This is a very nice fireplace.
  • 実にじつにJLPT N3approx.Common
    adverbIts core sense is 'really; truly; indeed': it affirms that something genuinely is the case, as in 'truly remarkable'. For 'terribly' it is only a marginal match; use it where English would say 'truly'.
    今日きょうは実じつによい天気てんきだ。↗
    It is truly a nice day today.

Use 大変 for the plain intensifier 'very, awfully', 「ひどく」 when the degree is bad or severe, 「ずいぶん」 for a softer 'quite, more than expected', while 「たいそう」 and 「実に」 are only marginal matches for 'terribly'.

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

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

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