IPA: /ˈstɑːrtəlmənt/
KK: /ˈstɑrtəlmənt/
A feeling of surprise or shock caused by something unexpected.
The sudden loud noise caused a startlement among the crowd.
Startlement is formed from "startle" (from Middle English "startlen", meaning to cause to jump or start) and the suffix "-ment" (meaning the action or result of). The word "startlement" refers to the state or condition of being startled or surprised.
Think of the action of being 'caused to jump' ('startle') and how the '-ment' suffix indicates a state or condition. This helps you remember that startlement is the state of being startled.