bellicosity
US /ˌbel.ɪˈkɑː.sɪ.ti/
UK /ˌbel.ɪˈkɑː.sɪ.ti/

1.
a warlike or hostile nature, disposition, or manner
:
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The diplomat's bellicosity surprised everyone at the peace talks.
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His constant bellicosity made it difficult to work with him.
a warlike or hostile nature, disposition, or manner