nonchalance

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the trait of remaining calm and seeming not to care;
a casual lack of concern
• Syn:
unconcern, indifference
• Derivationally related forms:
indifferent (for: indifference), nonchalant
• Hypernyms:
carefreeness

• Từ đồng nghĩa / Synonyms:
  unconcern, indifference