[adjective] often disapprovingSomeone, usually a young person, who is described as impressionable is very easily influenced by the people around them and what they are told, sometimes tending to copy other people's behaviour.He is at that impressionable age when he's very easily led by other children at school.
IMPRESSIONABLE
Meaning of IMPRESSIONABLE in English
Cambridge English vocab. Кембриджский английский словарь. 2012