The word "sme" appears to be a typo. It likely refers to "some," which is a determiner that refers to an unspecified quantity or number of something. It can also express a certain degree of ambiguity or vagueness in statements.
The word "some" originates from Old English "sum," which means "a certain amount or number." It is related to the German word "einige" and the Dutch word "sommige," both of which also mean "some" or "certain."