As an adverb headfirst
is with the head in front; headlong.
As an adjective headfirst
is with the head in front; headlong.
As a noun nosedive is
a headfirst fall or jump.
As a verb nosedive is
(of aircraft) to dive down in a steep angle.
headfirst
English
Adverb
(-)
With the head in front; headlong
Adjective
(-)
With the head in front; headlong
nosedive
English
Noun
(
en noun)
A headfirst fall or jump.
(economics) A rapid fall in price or value.
Verb
(nosediv)
(of aircraft) To dive down in a steep angle.
(economy) To perform a rapid fall in price or value.