white-knuckle
adjective
white-knuck·le
ˈ(h)wīt-ˈnə-kəl
variants
or less commonly white-knuckled
: marked by, causing, or experiencing tense nervousness
a white-knuckle ride on a roller coaster
a white-knuckle passenger
white-knuckler
noun
plural white-knucklers
The 65-mile speedway connecting Vancouver and the mountain town of Whistler was a white-knuckler for decades.
—Christian DeBenedetti
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Merriam-Webster unabridged
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