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cool as cucumber(expression, idiom, jittery)
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courteous
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deadpan
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depressant
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disarming
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disimpassioned
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dispassionate
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emergency
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enjoyable
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even-tempered
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extroverted
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fireproof
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forbearance
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forbearing
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fragrant
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geniality
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good-hearted(cold, indifferent)
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graceful
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gregarious
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happy-go-lucky
10 years ago|1.9k views|share |citing 
APASmart Define. (2016). irritable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/irritable/thesaurus/antonyms
ChicagoSmart Define. 2016. "irritable thesaurus" https://smartdefine.org/irritable/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, irritable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/irritable/thesaurus/antonyms>.
MLASmart Define. "irritable thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/irritable/thesaurus/antonyms>