knock something out of someone
phrasal verb with knock verb uk/nɒk/ us/nɑːk/
使（某人）丧失（某种品质）
If a quality is knocked out of someone, they lose that quality because the situation they are in does not allow it to exist.
Any creativity I had was soon knocked out of me at school. 在学校，我所拥有的任何一点创造力都很快丧失殆尽。