white–knuckle

white–knuckle /ˈwaɪtˈnʌkəl/ adjective
also white–knuckled /ˈwaɪtˈnʌkəld/
white–knuckle
/ˈwaɪtˈnʌkəl/
adjective
also white–knuckled /ˈwaɪtˈnʌkəld/
Britannica Dictionary definition of WHITE–KNUCKLE
always used before a noun
: showing, experiencing, or causing very strong feelings of fear, anxiety, etc.