恬然

tiánrán
  1. unperturbed
  2. nonchalant

CEDICT

unperturbed; calm; nonchalant

Wiktionary

安然自得的样子。

重編國語辭典

Entry Composition

1 恬 tián
  1. quiet
  2. calm
  3. tranquil
  4. peaceful
2 然 rán
  1. correct
  2. right
  3. so
  4. thus
  5. like this
  6. -ly

Related entries

淡定 dàndìng
  1. calm and collected
  2. unperturbed
镇定 zhèndìng
  1. calm
  2. unperturbed
  3. cool
「別擔心，」狄馬嘗試讓店員鎮定下來：「那不是我的血。」

"Don't worry," Dima attempted to put the woman at ease. "It's not mine."

Source: Tatoeba

满不在乎 mǎnbùzàihu
  1. not in the least concerned (idiom)
  2. reckless
  3. couldn't give a damn about it
  4. unperturbed
  5. couldn't care less
  6. harum scarum