Ya.

1. Yes; a word that expresses affirmation or assent. Will you go? Yea. It sometimes introduces a subject, with the sense of indeed, verily, truly, it is so.

Yea, hath God said, ye shall not eat of every tree in the garden? Genesis 3:1.

Let your communication be yea, yea; nay, nay. Matthew 5:37.

2. It sometimes enforces the sense of something preceding; not only so, but more.

Therein I do rejoice; yea, and will rejoice. Philippians 1:18.

3. In Scripture, it is used to denote certainty, consistency, harmony, and stability.

All the promises of God in him are yea, and in him are amen. 2 Corinthians 1:20.

[In this use, the word may be considered a noun.]

Yea is used only in the sacred and solemn style. [See Yes.]