rookie
Pronunciation:
/ˈɹʊki/noun
Definitions
An inexperienced recruit, especially in the police or armed forces.
A novice.
An athlete either new to the sport or to a team or in his first year of professional competition, especially said of baseball, basketball, hockey and American football players.
A type of firecracker, used by farmers to scare rooks.
adjective
Definitions
Non-professional; amateur
Example: The game was going well until I made that rookie mistake.