I was afraid of being late or saying something wrong because I really wanted to make a good impression on this man.

impression 是名词，来自动词 impress（给...留下印象）加上名词后缀 -ion。impress 由前缀 im-（表示"进入"）和 press（按压）组成，字面意思是"压入"，引申为"留下深刻印象"。 impression 在这里指"印象"，即对某人形成的看法或感觉。make a good impression 意思是"留下好印象"。