Imperturb-able
Adjective
Definition
unexcitable; unflustered; calm
Synonyms
1. Complacent
2. Equanimous
3. Nonchalant
Antonyms
1. Jittery
2. Irritable
3. Excitable
Sentences
1. Even when Jim had to save his dog from his burning house, he remained imperturbable and equanimous.
2. During times of crisis, teachers have to remain imperturbable in order for students to stay calm.
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Imperturbable Russian woman