48.impression [ɪm'preʃ(ə)n] /impress／impressed/ impressive

 impression [ɪm'preʃ(ə)n]  n.印象；压痕，印记

前缀im-/in-：(1) 里面，进入; (2) 否定前缀

单词press：v.压，按

后缀-tion：名词后缀，t被隐藏了

I’m impressed by your amazing performance.
Your amazing performance is impressive。  

impress [ɪm'pres], v.留下印记；留下印象

impressed[ɪm'prest],  adj.印象深刻的；让人刮目相看的

impressive [ɪm'presɪv],  adj.印象深刻的；让人刮目相看的

例：What were your first impressions of college? 你对大学的第一印象是什么？

例：the world's oldest fossil impressions of plant life 世界上最古老的植物化石印痕

例：The type of aid coming in makes no immediate impression on the horrific death rates. 这种即将到来的救助不会对恐怖的死亡率造成立杆见影的强烈影响。

例：I was very impressed by one young man at my lectures. 来上我课的一个年轻人让我很钦佩

例：It is an impressive achievement. 这是一项令人敬佩的成就。