hit the ground

:  to reach with or as if with a sudden blow

:  to come in quick forceful contact with

:  to strike (something, such as a ball) with an object (such as a bat, club, or racket) so as to impart or redirect motion

:  an act or instance of striking or forcefully coming in contact with someone or something :  an act or instance of hitting or being hit

:  a stroke of luck

:  a great success

:  the bottom of a body of water

:  sediment

:  ground coffee beans after brewing

:  to bring to or place on the ground

:  to cause to run aground

:  to provide a reason or justification for

: past tense and past participle ofgrind