keenとは 意味・定義・例文
Adjective 形容詞
1. having a sharp cutting edge or point
鋭い, 鋭利な, 切れ味の良い
a sharp knife[edge]
2. highly developed; able to perceptive things easily
鋭敏な, 鋭い, 強力な
A dog has a keen sense of smell.
3. full of eagerness or enthusiasm; greatly interested
熱心な, 熱烈な
She's a keen volleyball player.