Transliteration and Meaning:
The Greek word γνησίως (transliterated as gnesíōs and pronounced as “gneh-SEE-ohs”) is an adverb derived from the adjective γνήσιος (gnēsios), which means “genuine,” “sincere,” or “legitimate.” As an adverb, γνησίως conveys the meaning of doing something genuinely or sincerely, with a sense of authenticity and true intent. The word emphasizes the quality of being authentic or true to one’s nature or purpose.

Lexical Insights and Biblical Usage:
In lexicons like BDAG, Thayer’s, and Strong’s Concordance, γνησίως is noted for its use in expressing sincerity or genuineness in action or intent. BDAG describes it as “with sincere motivation,” while Thayer’s highlights its use in the context of being “faithfully” or “sincerely” done. The word is used only once in the New Testament, in Philippians 2:20, where Paul uses it to describe Timothy: “For I have no one else of kindred spirit who will genuinely (γνησίως) be concerned for your welfare.” Here, Paul emphasizes Timothy’s sincere and genuine concern for the Philippians, underscoring the depth of Timothy’s care and the authenticity of his intentions.

Classical Greek Literature Usage:
In classical Greek literature, γνησίως is used similarly to convey authenticity, sincerity, or genuineness. It appears in the writings of authors like Plato, where it is used to describe actions or individuals that are true to their nature or purpose. For instance, in Plato’s Laws (5.729c), the word is used to describe genuine or legitimate practices. Another example is found in the works of Aristotle, where γνησίως is used to emphasize actions carried out with true intent or purpose, reflecting the genuine character of the person or action involved.

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Summary:
The word γνησίως (G1104), transliterated as gnesíōs, carries the meaning of doing something with sincerity, genuineness, or authenticity. Derived from the adjective γνήσιος (genuine or legitimate), this adverb emphasizes the true intent or authentic nature of an action. In the New Testament, it is notably used in Philippians 2:20 to describe Timothy’s genuine concern for the Philippians, highlighting his sincere and faithful character. The word also appears in classical Greek literature, where it retains a similar emphasis on authenticity and sincerity. Whether in ancient texts or the New Testament, γνησίως underscores the importance of genuine intent and true-hearted actions.