ψευδάδελφος

a false brother

Definition

The Greek word ψευδάδελφος (pseydadelphos) refers to a 'false brother'—someone who claims to be a fellow Christian but is not genuine in their faith or allegiance. In the New Testament, it specifically denotes individuals who infiltrate the Christian community under false pretenses, often to undermine the gospel or impose legalistic requirements. In 2 Corinthians 11:26, Paul lists 'danger from false brothers' among the perils he faced, highlighting their threat to his ministry. In Galatians 2:4, these false brothers are described as spies who secretly slipped in to steal the believers' freedom in Christ, emphasizing their deceptive and destructive intent.

Biblical Usage

This word appears only twice in the New Testament, both times in Paul's letters, where it is used to warn against infiltrators within the early church. In 2 Corinthians 11:26, Paul includes 'danger from false brothers' in a list of hardships, indicating they posed a real peril to his missionary work. In Galatians 2:4, he identifies false brothers as those who sneaked in to spy on the freedom believers have in Christ, aiming to enslave them to the law. Both contexts stress deception and a threat to the gospel's integrity, showing Paul's concern for doctrinal purity and community safety.

Etymology

Derived from the Greek words ψευδής (pseudēs), meaning 'false' or 'lying,' and ἀδελφός (adelphos), meaning 'brother.' The compound literally means 'false brother,' combining the idea of deception with familial or communal relationship. Cognates include ψεύδομαι (pseudomai, 'to lie') and ἀδελφή (adelphē, 'sister'), reflecting its roots in describing fraudulent kinship within the faith community.

Semantic Range

This word is theologically significant as it underscores the reality of spiritual deception and the need for discernment within the church. It relates to doctrines of ecclesiology (the nature of the church) and sanctification, warning that not all who profess faith are genuine (cf. Matthew 7:15-23). Understanding ψευδάδελφος enriches Bible reading by highlighting the early church's struggles with hypocrisy and legalism, reminding believers to uphold both truth and grace while guarding against those who would distort the gospel.

In the first-century Greco-Roman world, the term 'brother' (ἀδελφός) often denoted close relational bonds within religious or social groups, not just biological ties. False brothers would have been seen as betrayers of this trust, exploiting the community's intimacy for harmful ends. This cultural understanding amplifies the severity of their deception, as they violated the honor-based relationships central to ancient society, making Paul's warnings particularly urgent for his original audience.

ψευδαπόστολος (pseudapostolos, G5570) — a false apostle, deceiving as a leader rather than a peer; ψευδοπροφήτης (pseudoprophētēs, G5578) — a false prophet, misleading through spiritual claims; ἀδελφός (adelphos, G80) — a true brother, for contrast in genuine fellowship.

Word Details

Scripture References