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nonchalant

/ˌnɑnʃəˈlɑnt/

calmly unconcerned, detached, or casually relaxed

From Latin non (not) + O.French chaloir (to matter).

adjective
non
Latin
Verified
non
“not”; the negating element

from French nonchalant "careless, indifferent," present participle of nonchaloir "be indifferent to, have no concern...

+1 more source
Old French
Verified
non-
“not,” used as a prefix in compounds

from French nonchalant "careless, indifferent," present participle of nonchaloir "be indifferent to, have no concern...

+1 more source
French
Verified
non-
Retained as the negative half of nonchalant

from French nonchalant "careless, indifferent," present participle of nonchaloir "be indifferent to, have no concern...

+1 more source
chaloir
Latin
Verified
calēre
“to be hot”; figuratively, to matter or concern

from Latin calere "be hot" (from PIE root *kele- (1) "warm"). French chaland "customer, client" is of the same origin....

Old French
Verified
chaloir
“to matter, to be of concern”

from Old French nonchaloir (“to be unconcerned”)

French
Verified
chaloir
The verb became literary and largely impersonal

from Old French nonchaloir (“to be unconcerned”)

Combined
Old French nonchaloir
non- “not” + chaloir “to matter”: literally, “not to care” or “not to be concerned”
French
Verified
nonchalant
Present participle of nonchaloir, meaning “careless, indifferent”

from French nonchalant "careless, indifferent," present participle of nonchaloir "be indifferent to, have no concern...

+1 more source
English
Verified
nonchalant
Borrowed by 1734 for an unconcerned or cool manner

from French nonchalant "careless, indifferent," present participle of nonchaloir "be indifferent to, have no concern...

+1 more source
Modern English
nonchalant

Picture a medieval French speaker declaring that something simply did not matter: non chaloir—“not to be concerned.” The surprising part is that chaloir reaches back to Latin calēre, “to be hot,” as if concern were emotional heat and indifference were the decision to stay cool. French also produced chaland, “customer” or “client,” from the same family of ideas about what matters to someone. English adopted nonchalant in 1734, giving its cool detachment a polished, faintly aristocratic sound. So when someone remains serenely calm while everyone else is panicking, remember the original image: their emotional thermostat is set to “not hot.”

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