G5571
ψευδής
false
ψευδής, -ές (ψεύδομαι), [in LXX for שֶׁקֶר, שָׁוְא, כָּזָב; etc. ;] lying, false, untrue (of persons and things): Rev.2:2; μάρτυρες, Act.6:13; as subst., ὁ ψ., a liar: Rev.21:8.† (AS)
The KJV translates G5571 in the following manner:
liars (4x), false (2x)
Full Thayer's lexicon entry
ψευδής — pseudḗs
ψευδής, ψευδές (ψεύδομαι), from Homer, Iliad4, 235 down, lying, deceitful, false: Rev 2:2; μάρτυρες, Act 6:13; substantively οἱ ψευδεῖς (A. V. liars), Rev 21:8 (here Lachmann ψεύστης, which see).
3 occurrences
Acts (1), Revelation of John (2)