Liar - Vine's Expository Dictionary of New Testament Words
Liar
[ A-1,Noun,G5583, pseustes ]a liar," occurs in John 8:44, John 8:55; Romans 3:4; 1 Timothy 1:10; Titus 1:12; 1 John 1:10; 1 John 2:4, 1 John 2:22; 1 John 4:20; 1 John 5:10.
[ B-1,Adjective,G5571, pseudes ]
"lying, false" (Eng., "pseudo-"), rendered "false" in Acts 6:13 and in the RV of Revelation 2:2 (AV, "liars"), is used as a noun, "liars," in Revelation 21:8. See FALSE.
Note: Many compound nouns are formed by the prefix pseudo-: See, e.g., APOSTLES, BRETHREN, CHRISTS, PROPHETS, TEACHERS, WITNESS.