nai is a particle of affirmation, used for direct replies, confirmations, and emphatic assent in the Bible.

As a particle, it marks affirmation in direct answers, confirmations of statements, and emphatic assent: speakers answer questions affirmatively in Acts 22:27 and Matthew 13:51, while statements such as the Father’s will and God’s judgments receive confirming affirmation in Luke 10:21 and Revelation 16:7.

1. Particle marking affirmation or confirming assent · dominant

   The supplied morphology identifies every instance as a Particle. It introduces direct affirmative replies in Acts 22:27 and Matthew 13:51; it also confirms or strengthens a preceding statement, as in Luke 10:21, where the APB renders the clause “yes, Father,” and Revelation 16:7, where it renders “Yes, Lord” before affirming that the judgments are true and just.

   Acts 22:27Matthew 13:51Luke 10:21Revelation 16:7Matthew 5:372 Corinthians 1:19

In the Anselm Project Bible: The APB commonly displays the particle as “Yes” in replies and confirmations, including repeated “yes” alongside “no” in Matthew 5:37 and 2 Corinthians 1:19. Some emphatic or connective force may be absorbed into the English clause.