impede/hinder/hamper/obstruct

You could use any of them, although a native speaker of English would probably not use obstruct. The idea of shyness is rather abstract, while an obstruction is usually seen as something concrete, or a willful action, rather than a passive condition.

I like:

Although he's shy, it certainly hasn't dampened his career in any way.

Meaning: It hasn't lessen his career, it's still blooming I also like hindered slightly.

To answer the question, any of those words could be used instead of "impeded".

U can.





David