Pseudos denotes falsehood opposed to truth, expressed in speech, belief, signs, and conduct.

The term denotes falsehood contrasted with truth: it can be spoken, believed, exchanged for truth, or found absent from a person's mouth. The same falsehood is also associated with deceptive signs and with conduct described as practicing it.

1. Falsehood opposed to truth · dominant

   In 1 John 2:21, the nominative singular form is set against truth, while in Ephesians 4:25 the accusative singular form is to be put off as each person speaks truth with a neighbor. John 8:44 places the accusative form in the clause about speaking it, and Romans 1:25 uses the dative singular form where truth about God is exchanged for it. Revelation 21:27 and Revelation 22:15 include the accusative form in descriptions of those who practice falsehood.

   1 John 2:21Ephesians 4:25John 8:44Romans 1:25Revelation 21:27Revelation 22:15

In the Anselm Project Bible: The APB variously presents the term as "lie" and "falsehood," and in 2 Thessalonians 2:9 it renders the surrounding phrase "wonders of falsehood." These renderings indicate the verse-level presentation rather than a separate definition in each passage.