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What is the opposite of nonchalant?

Need antonyms for nonchalant? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of indifferent, unconcerned, or behaving as if detached
“They were young and enthusiastic, ready to share their music and to try to make a living doing so.”
Adjective
Opposite of casually calm and relaxed
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“There are physiological repercussions from constantly being anxious about calls from creditors or a visit from the repo man.”
Adjective
Opposite of easygoing in temperament
“Gabriel did not need a weapon to appear intimidating as his size and unapproachable demeanor accomplished that well enough.”
Adjective
Opposite of cold and not feeling or showing any emotion
Adjective
Opposite of not easily upset or excited
Adjective
(attributive) Opposite of feeling or exuding self-assurance
“They were insecure young men, who were led astray by a charismatic self-proclaimed prophet.”
Adjective
Opposite of lighthearted and casually cheerful
Adjective
Opposite of cheerfully unconcerned about the future
Adjective
Opposite of produced or carried out in a hasty or perfunctory manner
Adjective
Opposite of done or acting in an indifferent or apathetic manner
“He displays a passionate disposition to saving endangered wildlife.”
Adjective
Opposite of having a relaxed, friendly, or unofficial style, manner, or nature
“You will abide by my strict rules to maintain absolute cleanliness and hygiene in my household!”
Adjective
Opposite of offensively nonchalant or cool in manner
Adjective
Opposite of free of concern or worries
“His hair was white, but he seemed so full of life beneath his rough, careworn exterior.”
Adjective
Opposite of not showing a proper sense of care or responsibility
“I consider us to be responsible people because we fill our recycling box to capacity every week, and put it out for collection.”
Adjective
Opposite of laid-back and relaxed in nature
“The frenetic action and strategic nuances of this sport make it exhilarating, yet fascinating.”
Adjective
Opposite of casual or relaxed in nature
“Around strangers, he would be restrained when expressing his true opinions so as not to offend anyone.”
Adjective
(of a remark) Opposite of expressed in a casual or understated way
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