spontaneous implies lack of prompting and connotes naturalness.
a spontaneous burst of applause
impulsive implies acting under stress of emotion or spirit of the moment.
impulsive acts of violence
instinctive stresses action involving neither judgment nor will.
blinking is an instinctive reaction
automatic implies action engaging neither the mind nor the emotions and connotes a predictable response.
his denial was automatic
mechanical stresses the lifeless, often perfunctory character of the response.
a mechanical teaching method
Example Sentences
I couldn't make out exactly what had happened, though I could guess how it started—the two of them talking, kidding around when Mrs. Ramsey came down to the library basement to file some periodicals, an impulsive kiss in the stacks … Tobias Wolff, Old School, 2003There was an odd nobility, a knight-errant quality, about Alan—in his willingness to suffer for the sake of life itself, in his tendency to view himself under harsher light than he would turn on others, in his impulsive generosity. Tracy Kidder, Home Town, 1999So speaks Maude Bailey, the celibate feminist scholar heroine of A. S. Byatt's fifth novel, as, in an impulsive collusion with a male scholar she scarcely knows, she runs off to Brittany. Joyce Carol Oates, Vogue, November 1990 She's impulsive and often does things that she later regrets. He needs to learn to control his impulsive behavior. She made an impulsive decision to quit her job. See More
Recent Examples on the WebLook for a way to be flexible without being impulsive.Chicago Tribune, 26 Aug. 2022 The Obama administration was often uncomfortable with the projection of American power, and the Trump administration, despite some good instincts, was an impulsive and organizational mess. Robert D. Kaplan, WSJ, 26 Aug. 2022 Watch your tongue, though, on the 26th and try not to be impulsive. Katharine Merlin, Town & Country, 16 July 2022 Scientists have long known the teenage and post-teenage period is a critical time for brain development and a time, for most teenage boys, often characterized by aggressive and impulsive behavior.New York Times, 2 June 2022 The judge said that Pistorius’ life was forever changed by the impulsive act.Fox News, 8 July 2022 The most common symptoms of CTE include difficulty thinking, depression, memory loss, aggression, impulsive behavior and emotional instability, among others. Natasha Dye, PEOPLE.com, 5 July 2022 For instance, an assessment might ask teachers how frequently a student engages in arguing and impulsive behavior or is sad. Nathaniel Von Der Embse, The Conversation, 3 June 2022 While the crew is in hypersleep, Buzz makes an impulsive decision to land on a mysterious planet and mine it for resources.cleveland, 13 June 2022 See More