Strong's #5569: pseudadelphos (pronounced psyoo-dad'-el-fos)

from 5571 and 80; a spurious brother, i.e. pretended associate:--false brethren.

Thayer's Greek Lexicon:

́

pseudadelphos

1) a false brother

2) one who ostentatiously professes to be a Christian, but is destitute of Christian knowledge and piety

Part of Speech: noun masculine

Relation: from G5571 and G80

Citing in TDNT: 1:144, 22

Usage:

This word is used 2 times:

 

2 Corinthians 11:26: "the sea, in perils among false brethren;"
Galatians 2:4: "And that because of false brethren unawares brought in, who came in privily to spy out our"