vyblednutý in English:

Tom cut his hand with a rusty knife.

You get rusty if you haven't spoken English for a long time.

get rusty

Iron machinery needs greasing to prevent it from getting rusty.

My car became rusty after 20 years in the sun.

My rusty Ford broke down, obstructing the intersection.

Would you scrape that rusty pan?

... day you're a bit rusty, by the second day...

Then I climb the bank up to the now rusty tracks and rotted wood and start walking towards Chamberlain.

The problem with this particular make of car is that it goes rusty very quickly

My English got rusty because I haven't used it for two years

I don't use my bike, it's all rusty.

rusty (of a language) not as fluent as before

It was a little rusty but not in a bad state.

Stayed in service till it was too rusty to fly, taken out of service.