impressionable
adjective often disapproving uk/ɪmˈpreʃ.ən.ə.bəl/ us/ɪmˈpreʃ.ən.ə.bəl/
（通常指年轻人）易受影响的
easily influenced by other people, especially because you are young
He's at that impressionable age when he's very easily led by other children. 他正处于那种易受影响的年龄，行为非常容易受其他孩子左右。