Antonym: yea. Similar words: naysayer. Meaning: [neɪ] 
n. a negative. adv. not this merely but also; not only so but.
n. a negative. adv. not this merely but also; not only so but. 
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1. Let your yea be yea and your nay be nay. 
2. The daily work continued;nay, it actually increased.
3. Long essays, nay, whole books have been written on this.
4. It is my pleasure, nay privilege, to introduce tonight's guest speaker.
5. We are willing, nay, eager to go.
6. Nay, lad. It's not that bad.
7. Such a policy is difficult, nay impossible.
8. I permit, nay, encourage it.
9. I suspect, nay, I am certain that he is wrong.
10. Nay lass, don't cry.
11. I can't say yay or nay to that really.
12. Angel Nay, look not so glum!
13. The administration explains these frustrations as understandable, nay inevitable, given the difficulties of transition.
14. This is an illogical, nay, fanciful urge since I have never really heard them.
15. You are permitted, nay, encouraged to come back as many times as you like.
16. You are permitted, nay encouraged, to come back as many times as your appetite permits.
17. Furthermore, we neutralize our ability to have nay significant impact in the struggle.
18. By another stroke - nay, complete coronary - of fortune, Hugo's bro Jebb was a bassist.
19. Nay, laddie. The lack of money's what's important.
20. Any woman in Plymouth, nay,[http://sentencedict.com/nay.html] any woman in England.
21. It is weighty, nay, conclusive.
22. If anyone has nay questions, please fire away.
23. Nay, they are a people who swerve from justice.
24. He who will not when he may, when he will he shall have nay.
25. They have the power to hire and fire managers and say yea or nay to big investment projects.
26. The House of Commons can merely say yea or nay to the executive judgment.
27. However, there is one specific item in respect of which I believe - nay, I know - the Government have fallen down.
28. The horses waded in blood up to their knees, nay up to the bridle.
29. Constituting 23 percent of the voting electorate, this community tended to deliver a monolithic yea or nay.
30. Frankl himself came through four concentration camps with an unimpaired, nay an enhanced, mentality.
More similar words: naysayer.