certain is used as '(a) few'. 'a couple'
certain people do stupid things in their lifes.
certain things are bad for the health
No, the coin had no specific meaning.
uncertain
1. Make certain of 2.Be careful or certain to do something; make certain of something
The bible meaning of gift is a one having a certain talent.
No.
Meaning: Certain (Confident, Positive, Sure, Assured, Firm, Convinced, Definite)
i think to cant in a certain way
Certain
a certain passage with informational texts
It means belonging to a certain continent.
That you are covered by a health insurance policy, meaning that you have an insurance company that will pay certain amounts for certain physical problems, illnesses, accidents, operations, medications and so on.
There is no widely recognized meaning for "crowkers." It may be a misspelling or a term specific to a certain context or region.