Is this your crossword clue?
"jolt" is also used as a crossword clue. If that's what you saw, the answer is often jar (3 letters).
Definitions
an abrupt spasmodic movement
Word origin
Perhaps from joll (“to knock, strike”) + -t (frequentative suffix).
Used in a sentence
“The bus jolted its passengers at every turn.”
“I jolted her out of complacency.”
“Her untimely death jolted us all.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Sharp surprise”4 letters
Not quite right?
"Search similar patterns."
J___