The word 某些 is formed by combining the character 某, which means "a certain" or "some" (implying an unspecified identity), with the character 些, which means "some" or "a few" (indicating an unspecified plural quantity). This creates a compound where the first character establishes the sense of being non-specific or indefinite, and the second character reinforces and quantifies that idea, resulting in a term that collectively expresses "certain ones" or "some" with a nuanced focus on an indefinite subset from a broader group.