How to say "mean" in Japanese

Choosing the right word
  • 平均へいきんJLPT N3approx.Common
    noun, suru verb, transitive verbCovers 'mean' only in the mathematical sense of an average. Use it for statistics and numbers, as in calculating the mean of a set of values.
    The temperature is above average this winter.
  • 卑劣ひれつCommon
    na-adjective, nounCovers 'mean' describing a contemptible, underhanded act — a mean trick or dirty deed. It condemns behavior as low and shameful rather than merely unkind.
  • 醜悪しゅうあくCommon
    na-adjective, nounIts core senses are 'ugly' and 'hideous'; the gloss 'mean' is marginal, so this is seldom the word you want for 'mean'. Think of it as describing something repulsively unsightly.
    市しのこの地区ちくの建物たてものは皆みな醜悪しゅうあくだ。↗
    The architecture in this part of the city is ugly.
  • 意地悪いじわるJLPT N2approx.Common
    na-adjective, nounThe everyday 'mean' for people and behavior: unkind, malicious, or ill-tempered. Use it of a person who is mean to others, in the sense of nasty rather than contemptible.
    彼女かのじょの意地悪いじわるな言葉ことばは結局けっきょく自分じぶんの身みに跳ね返はねかえってきた。↗
    Her unkind words boomeranged.
  • ずるいJLPT N2approx.Common
    i-adjectiveGlossed 'miserly; stingy,' i.e. mean with money, but its familiar sense is really 'sly, sneaky, unfair,' so it is seldom the word you want for 'mean'; it is usually written in kana alone.

Choose 平均 for the mathematical mean, 意地悪 for an unkind or nasty person, and 卑劣 for a contemptible act; 醜悪 and 「ずるい」 are only marginal matches, since they primarily mean 'hideous' and 'sly' respectively.

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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