unhysterical

adjective

un·​hys·​ter·​i·​cal ˌən-hi-ˈster-i-kəl 

: not given to or marked by hysteria : not hysterical

… Welsh's writing about intoxicants is refreshingly unhysterical.

—Jonathan Lethem

unhysterically

ˌən-hi-ˈster-i-k(ə-)lē 

adverb

Word History

First Known Use

1886, in the meaning defined above