IPA: /ˌkɒnstəˈneɪʃən/
KK: /kɒnstərˈneɪʃən/
A feeling of worry or shock caused by something unexpected or unpleasant.
She looked at the news with consternation, unable to believe what she had just heard.
Consternation → It is formed from "con-" (meaning together) and "sternere" (meaning to spread out or lay down). The word describes a state of being thrown together in confusion or dismay.
Think of being 'together' ('con-') in a state of confusion or fear — that's what consternation means.