(へいぜん)

へいぜんと
adverb
calmly; composedly; nonchalantly
1. calmly; composedly; nonchalantly; unflinchingly
Maintaining a calm, unperturbed demeanor in a situation where most people would be flustered, embarrassed, or upset. Often implies a surprising or even brazen level of composure.
彼女(かのじょ)平然(へいぜん)(こた)えた。
She answered calmly.
批判(ひはん)されても平然(へいぜん)としている。
He remains unfazed even when criticized.
あれだけの失敗(しっぱい)をしておいて平然(へいぜん)出勤(しゅっきん)してくるとは(おどろ)きだ。
I'm amazed that he shows up to work so nonchalantly after making such a big mistake.

平然(へいぜん)と describes maintaining composure in a situation where most people would be flustered, embarrassed, or upset. It often implies a surprising — sometimes admirable, sometimes brazen — level of calm.

COMMON PATTERNS:

  • 平然(へいぜん)としている: to remain unfazed, to be unperturbed
  • 平然(へいぜん)と〜する: to do something calmly/nonchalantly
  • 平然(へいぜん)とした態度(たいど): a calm/composed attitude
  • 平然(へいぜん)とした(かお): an untroubled face

NUANCE:
The word often carries a judgment from the speaker — either admiration for someone's composure under pressure, or criticism for being shameless or unremorseful.

SIMILAR WORDS:

  • 冷静(れいせい): calm, cool-headed (neutral, no judgment implied)
  • 平気(へいき): unfazed, unbothered (more casual)
  • 平然(へいぜん): unfazed in a noteworthy way (literary, implies observer's reaction)

REGISTER:
Somewhat formal and literary. More common in written narratives and news than in casual conversation.