名詞 rookie:

1. an awkward and inexperienced youth
   同義詞：cub, greenhorn

rook.ie

n.（名詞）
Slang
【俚語】
An untrained or inexperienced recruit, as in the army or police.
新兵：軍隊或警界中未受過訓練或沒有經(jīng)驗的新兵
An inexperienced person; a novice.
新生，生于：無經(jīng)驗的人；初學者
Sports A first-year player, especially in a professional sport.
【體育運動】 新隊員：尤指第一年參加聯(lián)賽的職業(yè)球隊的新隊員

來源：
Perhaps alteration of recruit
可能為 recruit的變化