All 6 Uses

impetuous
in
The Brothers Karamazov
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She shuddered all over, gazed at me for a second, turned horribly pale—white as a sheet, in fact—and all at once, not impetuously but softly, gently, bowed down to my feet—not a boarding-school curtsey, but a Russian bow, with her forehead to the floor.†
Chpt 3

impetuously = impulsively (acting suddenly without much thought)
Mitya, hearing her cry, trembled, jumped up, and with a yell rushed impetuously to meet her, not knowing what he was doing.†
Chpt 9
Kolya cried impetuously, his face glowing and radiant with delight.†
Chpt 10
On being gently asked by the President whether she had recovered sufficiently, Katerina Ivanovna exclaimed impetuously: "I am ready, I am ready!†
Chpt 12
It was the same impetuous Katya who had thrown herself on the mercy of a young profligate to save her father;
Chpt 12 *

impetuous = impulsive (acting suddenly without much thought)
Seeing it, she flew impetuously to him.†
Chpt Epil.

impetuously = impulsively (acting suddenly without much thought)

Definitions:

(1) (impetuous as in: an impetuous decision)
impulsive (acting suddenly without much thought) -- often with an unfortunate consequence
(2) (meaning too rare to warrant focus)
In historic literature, impetuous often refers to any rapid, forceful, and/or violent movement.