Synonyms of nonchalant in English:

nonchalant


See definition of nonchalant

adjective

1‘he had tried to appear nonchalant about the risks he was taking’

SYNONYMS
calm, cool, unconcerned, collected, cool, calm, and collected, cool as a cucumber, composed, airy
indifferent, unemotional, blasé, dispassionate, detached, apathetic, casual, offhand, insouciant
informal laid-back
ANTONYMS

anxious, concerned