headfirst
adverb
head·first ˈhed-ˈfərst 
1
: with the head foremost
dove headfirst into the waves
2
: headlong sense 2
headfirst adjective
Example Sentences
She dove into the water headfirst. She rushed into the relationship headfirst.
Recent Examples on the Web The series begins in the wee hours of the morning of Nov. 1, 1988, when four newspaper delivery girls run headfirst into a battle of a legendary time-traveling war. 
Kelly Lawler, USA TODAY, 29 July 2022 While cautious Augie tries not to get them into too much mischief, the irrepressible Perry dives headfirst into it, whether that means going swimming in the pool or digging an enormous hole in the yard. Lauren Morgan, EW.com, 28 July 2022 After two teases that mostly coasted on the generic outer-space adventure and IP nostalgia, this one dives headfirst into the plot, including a major twist that makes the timing of its theatrical release a bit ironic. Scott Mendelson, Forbes, 21 Apr. 2022 The Florence girls ran headfirst into a buzz saw in the form of Hoover on Thursday morning. Evan Dudley, al, 17 Feb. 2022 The film’s success begins and ends with the actor, who dives headfirst into a career-defining performance. Clayton Davis, Variety, 1 Oct. 2021 The film’s success begins and ends with actor Simon Rex, who dives headfirst into a career-defining performance. Clayton Davis, Variety, 2 Sep. 2021 Instead, his story dives headfirst into the challenges of creating identity, the agony of growing up and the ever-fickle nuances of family. Detroit Free Press Staff, Detroit Free Press, 19 Aug. 2021 Hernández drove Taillon's third pitch off the Green Monster, slid headfirst into third and trotted home when second baseman Odor's relay sailed into the protective netting above New York's dugout. Ken Powtak, Star Tribune, 24 July 2021 See More
Kelly Lawler, USA TODAY, 29 July 2022 While cautious Augie tries not to get them into too much mischief, the irrepressible Perry dives headfirst into it, whether that means going swimming in the pool or digging an enormous hole in the yard. Lauren Morgan, EW.com, 28 July 2022 After two teases that mostly coasted on the generic outer-space adventure and IP nostalgia, this one dives headfirst into the plot, including a major twist that makes the timing of its theatrical release a bit ironic. Scott Mendelson, Forbes, 21 Apr. 2022 The Florence girls ran headfirst into a buzz saw in the form of Hoover on Thursday morning. Evan Dudley, al, 17 Feb. 2022 The film’s success begins and ends with the actor, who dives headfirst into a career-defining performance. Clayton Davis, Variety, 1 Oct. 2021 The film’s success begins and ends with actor Simon Rex, who dives headfirst into a career-defining performance. Clayton Davis, Variety, 2 Sep. 2021 Instead, his story dives headfirst into the challenges of creating identity, the agony of growing up and the ever-fickle nuances of family. Detroit Free Press Staff, Detroit Free Press, 19 Aug. 2021 Hernández drove Taillon's third pitch off the Green Monster, slid headfirst into third and trotted home when second baseman Odor's relay sailed into the protective netting above New York's dugout. Ken Powtak, Star Tribune, 24 July 2021 See More Word History
First Known Use
1790, in the meaning defined at sense 1
Kids Definition
headfirst
adverb
head·first ˈhed-ˈfərst
: with the head in front
He fell headfirst down the stairs.
headfirst
adverb
as in recklessly
Synonyms & Similar Words
Relevance
- recklessly
- impetuously
- impulsively
- hurriedly
- precipitously
- precipitately
- rashly
- haphazardly
- headlong
- hotfoot
- automatically
- headily
- cursorily
- hotheadedly
- glancingly
- abruptly
- impromptu
- thoughtlessly
- impatiently
- hastily
- pell-mell
- offhandedly
- spontaneously
- suddenly
- offhand
Antonyms & Near Antonyms
- deliberately
- tentatively
- hesitantly
- slowly
- circumspectly
- designedly
- haltingly
- hesitatingly
- leisurely
- studiedly
- falteringly
- calculatingly