יְצֻרִים

Based on the definition and the single occurrence of the word in the Bible, it appears that "yatsur" (H3338) is a noun with the meaning of "member". This suggests that the word is used to describe a person who is a part of something, likely a community, family, or group. Given the semantic domain of "Light & Darkness", it is possible that the word "yatsur" is used to contrast the relationship between light and darkness in the broader context of the biblical passage. This contrast is likely used to highlight the role of the member in question, possibly in a context where they are operating in the light of truth or obedience. Unfortunately, the limited data available does not provide further insight into the specific significance of this word, as it only appears once in the entire Bible. However, its connection to the concept of membership and the broader framework of light and darkness is an intriguing aspect of its meaning.