How to say "temper" in Japanese

Choosing the right word
  • 機嫌きげんJLPT N3approx.Common
    nounCovers 'temper' as a momentary mood, as in being in a good or bad temper. It refers to how someone feels right now rather than to lasting character, and it often appears in expressions about pleasing or checking on someone's mood.
    彼かれは他人たにんの機嫌きげんを損そこねないように気きをつけている。↗
    He is chary of offending people.
  • 鍛えるきたえるJLPT N1approx.Common
    ichidan verb, transitive verbThis is the verb 'to temper' in the sense of tempering steel by forging, and by extension hardening or training the body and mind. Use it only for this action; it never describes anyone's mood or disposition.
    彼かれは鋼はがねを鍛きたえて刀かたなを作つくった。↗
    He forged the steel into a sword.
  • 気心きごころCommon
    nounMeans 'temper' as a person's inner disposition or makeup, the way someone fundamentally is. It is typically discussed in the context of getting to know or understanding another person's true nature.
  • 気性きしょうCommon
    nounAlso refers to 'temper' as settled character or temperament, such as an easygoing or fiery nature. Unlike 機嫌, it describes stable traits rather than a passing mood of the moment.
    彼かれの気性きしょうは手てに負おえない。↗
    He has an uncontrollable temper.
  • お天気おてんきCommon
    nounLiterally the weather with an honorific prefix, it can describe changeable moods, so it may render 'temper' in that fleeting sense. It is really the weather word, however, and is seldom the word you want for 'temper'.
    In comparison to which she's been in a really good mood recently.

Choose 機嫌 or 「お天気」 for someone's passing mood, 気性 or 気心 for settled temperament, and 「鍛える」 for the verb 'to temper' metal or train oneself.

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).

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